请输入您要查询的英文单词:

 

单词 active
释义

Definition of active in English:

active

adjective ˈaktɪvˈæktɪv
  • 1Engaging or ready to engage in physically energetic pursuits.

    although he was seventy he was still robust and active
    Example sentencesExamples
    • Woman cannot survive on meat alone, especially a physically active gal.
    • If staff members have to drive a car or cart from place to place, then children may wonder why they should be physically active.
    • For example, the current guidelines include stronger recommendations about the need to be physically active.
    • Among the more fit and active, vigorous activity is needed for additional health benefits.
    • Those who are physically active between the ages of 20 and 60 have been shown to be at reduced risk of Alzheimer's disease.
    • Despite predictions of almost unbounded mobility, most people in industrialised nations are less physically active than ever before.
    • Researchers are seeking 15 women aged 18-35, who are physically active and are on the pill.
    • Chuck Feeney is described by those who've met him as an active, vigorous man with the athletic physique of a former runner.
    • I get quite depressed in the winter if I don't stay very physically active.
    • Here are some ways to help encourage your child to be active and get moving every day.
    • In short, we were broke, and we had lost perhaps 90% of our most vigorous and active young men.
    • By 2007, according to the plan, 80% of primary schoolchildren will be physically active.
    • Colourful and co-ordinated, you can use the everyday tips and moves to get yourself active.
    • Women were asked in an initial survey how physically active they were.
    • And we thought what we'd try and do is use children's interest in the Internet and in computers as a strategy to get them more physically active.
    • Among older adults categorized as physically active, 24.7 percent engage in strength training.
    • Anyone who is physically active can tell us how important it is to eat and sleep well, as well as not pushing our bodies too far.
    • For boys, the desire to be physically active can further impede their interest in reading.
    • Accounts of his death differ, but all agree that he was physically and mentally active to the end.
    • Being physically active also helps, a morning run, ride or swim really gets those feel good hormones pumping and keeps those cortisol levels down.
    Synonyms
    mobile, energetic, agile, sporty, nimble, vigorous, vital, dynamic, sprightly, spry, lively, animated, bouncy, bubbly, perky, frisky, zestful, spirited
    busy, bustling, occupied, involved
    informal on the go, on the move, full of get-up-and-go, full of vim and vigour, full of beans, sparky, zippy, peppy, bright-eyed and bushy-tailed
    North American informal go-go
    1. 1.1 Moving or tending to move about vigorously or frequently.
      I couldn't feel the baby moving, and it was normally very active
      Example sentencesExamples
      • Once again the Dukes were on active service and they soon distinguished themselves by vigorous and active patrolling the line.
      • They are an active predator feeding mainly on whitefish such as whiting, codling and haddock, also small rays, flatfish, dogfish and even scallops and crabs.
      • This is analogous to the predator also being an active forager moving frequently between patches.
      • S / he is a good size, vigorously active, has all the relevant bits and bobs, and is doing just fine.
      • The light is always so atmospheric and the fish more active.
      • I also noticed that pike were fairly active taking the odd fish off of the hook.
      • One captive was extremely active, continuously moving about its enclosure in search of food.
      • They actually were quite active moving around and interacting with the crowd, it looks as if they have been together for awhile.
      • If the defense is active and moves from one side of the offense to the other quickly, it can be confusing to the offensive players teammates.
      • Others are active hunters, preying on the ocean floor and crushing food with blunt flattened teeth.
      • Whilst it has long been thought that eels are scavengers, we now know that in many fisheries eels are active hunters, feeding upon live prey.
      • These dances quickly change partners and keep campers active and moving.
      Synonyms
      robust, healthy, in good health, hale and hearty, strong, strong as an horse, strong as an lion, strong as an ox, sturdy, fine, fit, in good condition, in tip-top condition, in good shape, in good trim, in good kilter
      strenuous, powerful, potent, forceful, forcible, spirited, mettlesome, determined, resolute, aggressive, eager, keen, enthusiastic, zealous, ardent, fervent, vehement, intense, intensive, passionate, fiery, wild, unrestrained, uncontrolled, unbridled
    2. 1.2 Characterized by busy or lively activity.
      they enjoyed an active social life
      Example sentencesExamples
      • Why not come along and join us. we are a very busy and active institute and meet on the third Thursday at St Peter's Church in Hextable.
      • But don't worry, I lead a very active social life and my Sunday roast dinners-for-ten are legendary!
      • These are busy women with very active social lives.
      • Not that Elle actually had time to notice what went on with Aaron lately, what with her new busy and active social life and all.
      • I'm just a social drinker with a really active social calendar.
      • Local WI members say their meetings - which combine socialising with education - are very active and lively.
      • The Jobs Club has been very active and busy since it got up and running at the beginning of the year.
      • An overwhelming 65 per cent said the way to tackle it was to maintain an active social circle.
      • I have a very active social life. I have better friends than most.
      • Modern day Hollywood is a diverse, vital, and active community striving to preserve the elegant buildings from its past.
      • Steven encourages an active social scene with evening out paint-balling, bowling and karting all paid for by the company.
      • It didn't make sense for the active lifestyle of a busy family with working parents and two teenage children.
      • Caroline is tired, lonely and depressed even as she leads a fake, but highly active, social life.
      • Mom had a very active social life, despite her age, and she played tennis twice a week, plus being a member of about four different committees.
      • With the sociological changes of the 19th century, social life became more active, giving rise to reunions and outings to the countryside.
      • Keeping busy and leading an active life are all part of the big picture for Mrs Morris.
      • Sure there's a lot of computer games, but there's plenty of active pursuits going on after school too.
      • He has an active social life, and snowboards and plays representation level soccer.
      • A few years ago my parents started having a more active social life than I did.
      • Who knows, perhaps some people like a busy, active church: but somehow wonder and reverence seem to go better with quiet.
    3. 1.3 (of a person's mind or imagination) alert and lively.
      Caroline nodded slowly, her active mind already racing ahead
      Example sentencesExamples
      • Standing silently in a silent room when you're low on caffine and have had less than 6 hours sleep requires an active imagination.
      • It was, indeed, a confluence of active minds from various schools in Madurai district.
      • Isn't it great, how kids can amuse themselves with nothing more than a climbable tree and an active imagination?
      • I must admit, I do find running relaxing on a daily basis, but my mind is still active.
      • As well as an active mind, Caroline was also very athletic.
      • Inside of the child, emotions stirred and the mind was incredibly active.
      • Morbid thoughts plagued her overly active imaginative mind and sent chills down her spine.
      • I kinda slumped to the ground even though my mind was active.
      • All the poems in Trouble in Mind depend on the reader's active imagination; in fact, they read as instructions for it.
      • My active mind has always been a great strength, but as long as I can remember, my mind never rests and I exhaust myself mentally and emotionally.
      • The beauty of Humphrey's work is that his mind is active on so many levels at once.
      • Now we know what had been churning in his doubtless active mind.
      • Is it accurate to say that children have active imaginations?
      • Keeping up with current affairs and maintaining an active mind has been the key to Gladys Whitehead's long life.
      • Their active minds constantly sought ways to be more efficient.
      • Possessing an active imagination ranks high on my list of cherished blessings.
      • Therefore, the reader's active mind will in a way determine his understanding of the novel.
      • My friend also had something most of these heirs don't: a vital and active mind.
      • Not that I've spent a lot of time rummaging around such places, mind you, but I got me an active imagination.
      • Sixty-nine percent of them were using the Internet regularly, and they had very active minds.
  • 2Pursuing an occupation or activity at a particular place or in a particular way.

    the artist was active in the 1920s
    tigers are active mainly at night
    a politically active student body
    sexually active teenagers
    Example sentencesExamples
    • The potato leafhopper is active during the summer months, and can cause severe yield and quality losses in alfalfa.
    • The fish become more active and our plants emerge from their dormancy.
    • They are mainly active during the day and their gait is sideways.
    • His revisionist interpretation of the Renaissance had an electrifying effect on other French scholars active during the last decade of the nineteenth century.
    • Spring is when many songbirds are most active, busy competing for mates, establishing breeding pairs, setting up territories.
    • These are those who live in the areas where the fighters are active.
    • The Feather finfish resembling a bat is active at night.
    • But several hunts organized by the city government over the past months turned up empty-handed, apparently since cold-blooded reptiles are not very active during the chillier months.
    • Egg-laying adults are especially active during bloom, a time period when insecticides should not be applied.
    • ‘Shoplifters are certainly more active during Christmas,’ a spokesperson said.
    • His brother, Geer van Velde (1898 - 1977), was also a painter and likewise active mainly in France.
    • Aggregating in groups during the daytime, they are usually active at night.
    • We use a little motorboat to search for the crocodilians at night, when they are active.
    • Many species of hawkmoth are active at dawn and dusk when the colour of light changes considerably.
    • Signal crayfish become less active and move around less during the winter.
    • His name suggests he was born in Venice, but he was active mainly in Florence.
    • It is thought losses reflect a period in early mammalian history in which mammals were active mainly at night.
    • Generally, Quokkas sleep during the day, but they are very active at night.
    • The lack of knowledge stemmed from the fact that cats are active mainly at night and almost impossible to see in the dense vegetation where they usually live.
    • Bass sulking amid summer heat sense the change and big fish become more active.
    1. 2.1 Participating or engaged in a particular sphere or activity in a positive or spontaneous rather than a passive way.
      she was an active member of the society
      he had never been very active in the affairs of the institute
      he enjoyed the active support of the government
      Example sentencesExamples
      • In fact, it is precisely times like these that encourage students to become politically active.
      • The order has a large urban base, and its educated members are particularly politically active.
      • About half of all Americans age 60 and older are sexually active, according to the National Council on Aging.
      • He also keeps himself fairly socially active, spearheading a charity to benefit inner-city youths of musical talent.
      • But with more than a quarter of young people being sexually active before they reach the age of 16, this is the age group least likely to use contraception.
      • ‘Teens are becoming sexually active before they're ready,’ reads another result.
      • I would like to think such is not the case either, as I have been politically active and have engaged with my community in many ways outside of my university life.
      • We believe that progress toward that end requires that the government be active and engaged in delivering those things.
      • They clearly targeted sexually active people with one message: If you're having sex, do it safely.
      • I have been pretty active on the Internet in the past days, but too little time to update this blog.
      • About a quarter were sexually active before participating in the Wise Guys program.
      • He became politically active as a student and was a founder member of the Congress of Democrats.
      • The children of this class who are now in their early twenties remember little or nothing of Soviet privation and are active on the nightlife social scene.
      • The Ministry of Environment and Forests is calling students to play an active role in environment protection.
      • The project required the students to become active participants in the course.
      • Women, at least in the economic sphere, are as active as men, while the latter also exercise domination in the private sphere.
      • More than seven in 10 who had not had sex came from a family where parents were married to each other, compared with only half of the teenagers who were sexually active.
      • But some of them were very nice chaps and took a very active part in student life; and added a bit of common sense to student stupidity perhaps.
      • The man has been pretty active on the social front.
      • Family centered strategies also encourage surrogate parents to become active in their grandchild's education.
      • She was already an established singer at the Opera, and many other composers had family connections with male musicians active on the operatic scene.
      • These pastors also are politically active and engaged in civil rights.
      Synonyms
      hard-working, busy, industrious, diligent, tireless, contributing, enterprising, influential
  • 3(of a thing) working; operative.

    the old watermill was active until 1960
    Example sentencesExamples
    • And, frankly, we saw what happened once active operations got under way.
    • I'm having to change phone numbers along with addresses, and the new number won't be active until Saturday morning.
    • At that time, many Reserve units were flying and operating legacy aircraft that were no longer in the active force.
    • I seem to remember some research that showed that different areas of the brain are active when you use the mouse and the keyboard.
    • Rush trained as a ship carver and operated an active workshop for more than fifty years.
    • The survey set out to understand the sectors where these businesses are active, where they operate, who they benefit and how they generate income.
    • The Army must continually examine how it will integrate contractors into units during active operations.
    • An active e-commerce operation has almost no time to spare for restore after a data interruption.
    • Rational strengths of force groupings for the employment in the zone of active combat operations can be substantiated by two methods.
    • The website needs an update as some of the links are no longer active.
    • Link not active yet until he posts another entry so look for the post made on Friday, 23rd May.
    • The B-52Bs replaced the 95th's B-36s and the unit was active until 1966 when its aircraft were flown to Davis-Morithan for storage and scrapping.
    • One hour before the start of active combat operations, it is recommended to begin Stage 3 of the operation.
    • The site, however, remained active until the end of last week.
    • The yard remained active until 1957, when a fire destroyed the thatched barn and cattle yards, leaving the existing buildings.
    • Under the established law of armed conflict, he can civilly intern a captured combatant until the end of active hostilities.
    • He has also noted that about half the cases this year occurred during active hostilities or combat operations in the Persian Gulf.
    • The Army clings to the belief that all active units should be ready to deploy at any time.
    • These gauges are active today and are operated as a part of the Passaic Flood Warning System.
    • There was no trace of the medieval synagogue in Aldwark nor the Petergate synagogue, active until as recently as 1975.
    Synonyms
    operative, working, functioning, functional, operating, operational, in action, in operation, in force, live
    1. 3.1 (of an electric circuit) capable of modifying its state or characteristics automatically in response to input or feedback.
      the receiver is continuously active whenever the vehicle ignition is switched on
      Example sentencesExamples
      • Such QD devices can be integrated into the photonic crystals that will be used as active optical router circuits.
      • An active cascode amplifier circuit which includes an active cascode amplifier and an amplitude limiter.
      • An active bypass circuit for use with a battery pack having a plurality of cells and method of operation thereof.
      • The valve-off state is always active until a signal is received to switch to the valve-on mode.
      • Each of the associated heater resistors has associated active circuitry on the chip.
    2. 3.2 (of a volcano) that is erupting or has erupted in historical times.
      the volcano became active on 28 March last year
      Etna is Europe's highest and most active volcano
      Example sentencesExamples
      • The active volcanoes erupt a type of rock known as basalt.
      • Mount St. Helens has been an active volcano for about 40,000 years with intermittent periods of dormancy.
      • Some of the best rice-growing regions of Indonesia are in the shadow of active volcanoes.
      • Deception Island is a historically active volcano with the last eruptions about 30 years ago.
      • They are all of volcanic origin; Fogo, the only volcano still active, last erupted in 1995.
    3. 3.3 (of a disease) in which the symptoms are manifest; not in remission or latent.
      active colitis
      Example sentencesExamples
      • None of the children had evidence of active disease on chest radiograph.
      • The differential diagnosis from chronic active hepatitis may present some difficult problems.
      • For example, the clinician may want to know if the disease is active, or which organs might be involved.
      • Two percent of elderly with latent infections develop active tuberculosis.
      • In this regard, it is desirable to test their ability to distinguish between active disease and indolent infection.
    4. 3.4 Having a chemical or biological effect on something.
      active ingredients
      Example sentencesExamples
      • Cosmetic lotions and potions don't contain enough of the active ingredient they boast to have any noticeable effect.
      • But up until now, the active ingredient of the drug, oseltamivir, is found in a plant, the star anise.
      • The anoxia probably prevented active and continuous bioturbation of the sediment.
      • It is a very active metal that reacts vigorously with oxygen in the air, catching fire spontaneously.
      • Boron converts Vitamin D into its active form thus participating in the calcium absorption process.
      • But apparently they must list the reported side effects to any of the active ingredients in the medicine.
      • The chemical, salicylic acid, is an active ingredient in aspirin, which is known to thin the blood and reduce the risk of heart disease and bowel cancer.
      • Large numbers of plant species are a great source of biologically active compounds whose effect on human health or genetic material is mostly unknown.
      • They then perform a crude screening of the organisms to determine if they contain novel chemicals that are biologically active.
      • This was supposedly caused by a chemical transformation of the active ingredient, but that conclusion was disputed by other scientists.
  • 4Grammar
    Denoting a voice of verbs in which the subject is typically the person or thing performing the action and which can take a direct object (e.g. she loved him as opposed to the passive form he was loved).

    Example sentencesExamples
    • We would expect strong active verbs in a news story about tsunami relief efforts.
    • Another advantage of sentences written in active voice is that the sentences are usually shorter.
    • Be ruthless with clutter, write in the active voice, place each idea into a sentence of its own, and lastly, get your punctuation right.
    • Use active verbs and active sentences when writing your site's copy.
    • Military vision documents are written in the active voice, with strong verbs and modifiers.
noun ˈaktɪvˈæktɪv
Grammar
  • An active form of a verb.

    Example sentencesExamples
    • By the way, they discuss many different kinds of bias on the part of the news agency, not just choice between actives and passives.
    • Then there were yet more inflections of verbs, passives alongside actives, subjunctives alongside indicatives, imperatives, present and past participles, gerunds and gerundives.

Derivatives

  • activeness

  • noun ˈaktɪvnəsˈæktɪvnəs

Origin

Middle English (in the sense 'preferring action to contemplation'): from Latin activus, from act- 'done', from the verb agere.

 
 

Definition of active in US English:

active

adjectiveˈaktivˈæktɪv
  • 1Engaging or ready to engage in physically energetic pursuits.

    I needed to change my lifestyle and become more active
    Example sentencesExamples
    • Woman cannot survive on meat alone, especially a physically active gal.
    • Colourful and co-ordinated, you can use the everyday tips and moves to get yourself active.
    • By 2007, according to the plan, 80% of primary schoolchildren will be physically active.
    • Those who are physically active between the ages of 20 and 60 have been shown to be at reduced risk of Alzheimer's disease.
    • Anyone who is physically active can tell us how important it is to eat and sleep well, as well as not pushing our bodies too far.
    • And we thought what we'd try and do is use children's interest in the Internet and in computers as a strategy to get them more physically active.
    • If staff members have to drive a car or cart from place to place, then children may wonder why they should be physically active.
    • Researchers are seeking 15 women aged 18-35, who are physically active and are on the pill.
    • I get quite depressed in the winter if I don't stay very physically active.
    • Among the more fit and active, vigorous activity is needed for additional health benefits.
    • Despite predictions of almost unbounded mobility, most people in industrialised nations are less physically active than ever before.
    • Among older adults categorized as physically active, 24.7 percent engage in strength training.
    • Chuck Feeney is described by those who've met him as an active, vigorous man with the athletic physique of a former runner.
    • Here are some ways to help encourage your child to be active and get moving every day.
    • For boys, the desire to be physically active can further impede their interest in reading.
    • For example, the current guidelines include stronger recommendations about the need to be physically active.
    • Women were asked in an initial survey how physically active they were.
    • Accounts of his death differ, but all agree that he was physically and mentally active to the end.
    • In short, we were broke, and we had lost perhaps 90% of our most vigorous and active young men.
    • Being physically active also helps, a morning run, ride or swim really gets those feel good hormones pumping and keeps those cortisol levels down.
    Synonyms
    mobile, energetic, agile, sporty, nimble, vigorous, vital, dynamic, sprightly, spry, lively, animated, bouncy, bubbly, perky, frisky, zestful, spirited
    1. 1.1 Moving or tending to move about vigorously or frequently.
      active fish need a larger tank
      Example sentencesExamples
      • This is analogous to the predator also being an active forager moving frequently between patches.
      • I also noticed that pike were fairly active taking the odd fish off of the hook.
      • The light is always so atmospheric and the fish more active.
      • They are an active predator feeding mainly on whitefish such as whiting, codling and haddock, also small rays, flatfish, dogfish and even scallops and crabs.
      • Others are active hunters, preying on the ocean floor and crushing food with blunt flattened teeth.
      • One captive was extremely active, continuously moving about its enclosure in search of food.
      • S / he is a good size, vigorously active, has all the relevant bits and bobs, and is doing just fine.
      • Once again the Dukes were on active service and they soon distinguished themselves by vigorous and active patrolling the line.
      • If the defense is active and moves from one side of the offense to the other quickly, it can be confusing to the offensive players teammates.
      • Whilst it has long been thought that eels are scavengers, we now know that in many fisheries eels are active hunters, feeding upon live prey.
      • These dances quickly change partners and keep campers active and moving.
      • They actually were quite active moving around and interacting with the crowd, it looks as if they have been together for awhile.
      Synonyms
      robust, healthy, in good health, hale and hearty, strong, strong as an horse, strong as an lion, strong as an ox, sturdy, fine, fit, in good condition, in tip-top condition, in good shape, in good trim, in good kilter
      strenuous, powerful, potent, forceful, forcible, spirited, mettlesome, determined, resolute, aggressive, eager, keen, enthusiastic, zealous, ardent, fervent, vehement, intense, intensive, passionate, fiery, wild, unrestrained, uncontrolled, unbridled
    2. 1.2 Characterized by busy or lively activity.
      they enjoyed an active social life
      Example sentencesExamples
      • Local WI members say their meetings - which combine socialising with education - are very active and lively.
      • But don't worry, I lead a very active social life and my Sunday roast dinners-for-ten are legendary!
      • The Jobs Club has been very active and busy since it got up and running at the beginning of the year.
      • An overwhelming 65 per cent said the way to tackle it was to maintain an active social circle.
      • Who knows, perhaps some people like a busy, active church: but somehow wonder and reverence seem to go better with quiet.
      • He has an active social life, and snowboards and plays representation level soccer.
      • Modern day Hollywood is a diverse, vital, and active community striving to preserve the elegant buildings from its past.
      • Keeping busy and leading an active life are all part of the big picture for Mrs Morris.
      • I have a very active social life. I have better friends than most.
      • Not that Elle actually had time to notice what went on with Aaron lately, what with her new busy and active social life and all.
      • These are busy women with very active social lives.
      • Mom had a very active social life, despite her age, and she played tennis twice a week, plus being a member of about four different committees.
      • Caroline is tired, lonely and depressed even as she leads a fake, but highly active, social life.
      • Sure there's a lot of computer games, but there's plenty of active pursuits going on after school too.
      • It didn't make sense for the active lifestyle of a busy family with working parents and two teenage children.
      • Why not come along and join us. we are a very busy and active institute and meet on the third Thursday at St Peter's Church in Hextable.
      • Steven encourages an active social scene with evening out paint-balling, bowling and karting all paid for by the company.
      • I'm just a social drinker with a really active social calendar.
      • A few years ago my parents started having a more active social life than I did.
      • With the sociological changes of the 19th century, social life became more active, giving rise to reunions and outings to the countryside.
    3. 1.3 (of a person's mind or imagination) alert and lively.
      Example sentencesExamples
      • Keeping up with current affairs and maintaining an active mind has been the key to Gladys Whitehead's long life.
      • Inside of the child, emotions stirred and the mind was incredibly active.
      • Therefore, the reader's active mind will in a way determine his understanding of the novel.
      • I must admit, I do find running relaxing on a daily basis, but my mind is still active.
      • It was, indeed, a confluence of active minds from various schools in Madurai district.
      • As well as an active mind, Caroline was also very athletic.
      • The beauty of Humphrey's work is that his mind is active on so many levels at once.
      • Not that I've spent a lot of time rummaging around such places, mind you, but I got me an active imagination.
      • Is it accurate to say that children have active imaginations?
      • Possessing an active imagination ranks high on my list of cherished blessings.
      • Their active minds constantly sought ways to be more efficient.
      • My active mind has always been a great strength, but as long as I can remember, my mind never rests and I exhaust myself mentally and emotionally.
      • All the poems in Trouble in Mind depend on the reader's active imagination; in fact, they read as instructions for it.
      • I kinda slumped to the ground even though my mind was active.
      • Standing silently in a silent room when you're low on caffine and have had less than 6 hours sleep requires an active imagination.
      • Isn't it great, how kids can amuse themselves with nothing more than a climbable tree and an active imagination?
      • Morbid thoughts plagued her overly active imaginative mind and sent chills down her spine.
      • My friend also had something most of these heirs don't: a vital and active mind.
      • Sixty-nine percent of them were using the Internet regularly, and they had very active minds.
      • Now we know what had been churning in his doubtless active mind.
  • 2Pursuing an occupation or activity at a particular place or in a particular way.

    the artist was active in the 1920s
    tigers are active mainly at night
    a politically active student body
    Example sentencesExamples
    • The lack of knowledge stemmed from the fact that cats are active mainly at night and almost impossible to see in the dense vegetation where they usually live.
    • We use a little motorboat to search for the crocodilians at night, when they are active.
    • But several hunts organized by the city government over the past months turned up empty-handed, apparently since cold-blooded reptiles are not very active during the chillier months.
    • Many species of hawkmoth are active at dawn and dusk when the colour of light changes considerably.
    • Signal crayfish become less active and move around less during the winter.
    • The Feather finfish resembling a bat is active at night.
    • They are mainly active during the day and their gait is sideways.
    • These are those who live in the areas where the fighters are active.
    • ‘Shoplifters are certainly more active during Christmas,’ a spokesperson said.
    • His name suggests he was born in Venice, but he was active mainly in Florence.
    • The potato leafhopper is active during the summer months, and can cause severe yield and quality losses in alfalfa.
    • It is thought losses reflect a period in early mammalian history in which mammals were active mainly at night.
    • Aggregating in groups during the daytime, they are usually active at night.
    • His brother, Geer van Velde (1898 - 1977), was also a painter and likewise active mainly in France.
    • Egg-laying adults are especially active during bloom, a time period when insecticides should not be applied.
    • The fish become more active and our plants emerge from their dormancy.
    • Spring is when many songbirds are most active, busy competing for mates, establishing breeding pairs, setting up territories.
    • Generally, Quokkas sleep during the day, but they are very active at night.
    • His revisionist interpretation of the Renaissance had an electrifying effect on other French scholars active during the last decade of the nineteenth century.
    • Bass sulking amid summer heat sense the change and big fish become more active.
    1. 2.1 Participating or engaged in a particular sphere or activity in a positive or spontaneous rather than a passive way.
      she was an active member of the society
      he had never been very active in the affairs of the institute
      he enjoyed the active support of the government
      Example sentencesExamples
      • In fact, it is precisely times like these that encourage students to become politically active.
      • About a quarter were sexually active before participating in the Wise Guys program.
      • The project required the students to become active participants in the course.
      • The order has a large urban base, and its educated members are particularly politically active.
      • I have been pretty active on the Internet in the past days, but too little time to update this blog.
      • But with more than a quarter of young people being sexually active before they reach the age of 16, this is the age group least likely to use contraception.
      • More than seven in 10 who had not had sex came from a family where parents were married to each other, compared with only half of the teenagers who were sexually active.
      • They clearly targeted sexually active people with one message: If you're having sex, do it safely.
      • Family centered strategies also encourage surrogate parents to become active in their grandchild's education.
      • The man has been pretty active on the social front.
      • These pastors also are politically active and engaged in civil rights.
      • He became politically active as a student and was a founder member of the Congress of Democrats.
      • The children of this class who are now in their early twenties remember little or nothing of Soviet privation and are active on the nightlife social scene.
      • I would like to think such is not the case either, as I have been politically active and have engaged with my community in many ways outside of my university life.
      • The Ministry of Environment and Forests is calling students to play an active role in environment protection.
      • ‘Teens are becoming sexually active before they're ready,’ reads another result.
      • We believe that progress toward that end requires that the government be active and engaged in delivering those things.
      • She was already an established singer at the Opera, and many other composers had family connections with male musicians active on the operatic scene.
      • Women, at least in the economic sphere, are as active as men, while the latter also exercise domination in the private sphere.
      • But some of them were very nice chaps and took a very active part in student life; and added a bit of common sense to student stupidity perhaps.
      • He also keeps himself fairly socially active, spearheading a charity to benefit inner-city youths of musical talent.
      • About half of all Americans age 60 and older are sexually active, according to the National Council on Aging.
      Synonyms
      hard-working, busy, industrious, diligent, tireless, contributing, enterprising, influential
  • 3(of a thing) working; operative.

    the old mill was active until 1960
    Example sentencesExamples
    • Link not active yet until he posts another entry so look for the post made on Friday, 23rd May.
    • The site, however, remained active until the end of last week.
    • The website needs an update as some of the links are no longer active.
    • The survey set out to understand the sectors where these businesses are active, where they operate, who they benefit and how they generate income.
    • The yard remained active until 1957, when a fire destroyed the thatched barn and cattle yards, leaving the existing buildings.
    • There was no trace of the medieval synagogue in Aldwark nor the Petergate synagogue, active until as recently as 1975.
    • He has also noted that about half the cases this year occurred during active hostilities or combat operations in the Persian Gulf.
    • An active e-commerce operation has almost no time to spare for restore after a data interruption.
    • Rush trained as a ship carver and operated an active workshop for more than fifty years.
    • I'm having to change phone numbers along with addresses, and the new number won't be active until Saturday morning.
    • These gauges are active today and are operated as a part of the Passaic Flood Warning System.
    • I seem to remember some research that showed that different areas of the brain are active when you use the mouse and the keyboard.
    • The Army clings to the belief that all active units should be ready to deploy at any time.
    • At that time, many Reserve units were flying and operating legacy aircraft that were no longer in the active force.
    • The B-52Bs replaced the 95th's B-36s and the unit was active until 1966 when its aircraft were flown to Davis-Morithan for storage and scrapping.
    • Under the established law of armed conflict, he can civilly intern a captured combatant until the end of active hostilities.
    • Rational strengths of force groupings for the employment in the zone of active combat operations can be substantiated by two methods.
    • The Army must continually examine how it will integrate contractors into units during active operations.
    • And, frankly, we saw what happened once active operations got under way.
    • One hour before the start of active combat operations, it is recommended to begin Stage 3 of the operation.
    Synonyms
    operative, working, functioning, functional, operating, operational, in action, in operation, in force, live
    1. 3.1 (of an electrical circuit) capable of modifying its state or characteristics automatically in response to input or feedback.
      Example sentencesExamples
      • An active bypass circuit for use with a battery pack having a plurality of cells and method of operation thereof.
      • The valve-off state is always active until a signal is received to switch to the valve-on mode.
      • Such QD devices can be integrated into the photonic crystals that will be used as active optical router circuits.
      • An active cascode amplifier circuit which includes an active cascode amplifier and an amplitude limiter.
      • Each of the associated heater resistors has associated active circuitry on the chip.
    2. 3.2 (of a volcano) currently erupting, or that has erupted within historical times.
      Often contrasted with dormant or extinct
      Example sentencesExamples
      • Some of the best rice-growing regions of Indonesia are in the shadow of active volcanoes.
      • The active volcanoes erupt a type of rock known as basalt.
      • They are all of volcanic origin; Fogo, the only volcano still active, last erupted in 1995.
      • Deception Island is a historically active volcano with the last eruptions about 30 years ago.
      • Mount St. Helens has been an active volcano for about 40,000 years with intermittent periods of dormancy.
    3. 3.3 (of a disease) in which the symptoms are manifest; not in remission or latent.
      active colitis
      Example sentencesExamples
      • Two percent of elderly with latent infections develop active tuberculosis.
      • In this regard, it is desirable to test their ability to distinguish between active disease and indolent infection.
      • The differential diagnosis from chronic active hepatitis may present some difficult problems.
      • For example, the clinician may want to know if the disease is active, or which organs might be involved.
      • None of the children had evidence of active disease on chest radiograph.
    4. 3.4 Having a chemical or biological effect on something.
      350 active ingredients have been banned from pesticides
      Example sentencesExamples
      • Boron converts Vitamin D into its active form thus participating in the calcium absorption process.
      • But apparently they must list the reported side effects to any of the active ingredients in the medicine.
      • This was supposedly caused by a chemical transformation of the active ingredient, but that conclusion was disputed by other scientists.
      • The anoxia probably prevented active and continuous bioturbation of the sediment.
      • The chemical, salicylic acid, is an active ingredient in aspirin, which is known to thin the blood and reduce the risk of heart disease and bowel cancer.
      • Cosmetic lotions and potions don't contain enough of the active ingredient they boast to have any noticeable effect.
      • They then perform a crude screening of the organisms to determine if they contain novel chemicals that are biologically active.
      • It is a very active metal that reacts vigorously with oxygen in the air, catching fire spontaneously.
      • But up until now, the active ingredient of the drug, oseltamivir, is found in a plant, the star anise.
      • Large numbers of plant species are a great source of biologically active compounds whose effect on human health or genetic material is mostly unknown.
  • 4Grammar
    Relating to or denoting the voice that attributes the action of a verb to the person or thing from which it logically proceeds (e.g., of the verbs in guns kill and we saw him).

    The opposite of passive
    Example sentencesExamples
    • Be ruthless with clutter, write in the active voice, place each idea into a sentence of its own, and lastly, get your punctuation right.
    • Military vision documents are written in the active voice, with strong verbs and modifiers.
    • Another advantage of sentences written in active voice is that the sentences are usually shorter.
    • We would expect strong active verbs in a news story about tsunami relief efforts.
    • Use active verbs and active sentences when writing your site's copy.
nounˈaktivˈæktɪv
Grammar
  • 1An active form of a verb.

    Example sentencesExamples
    • Then there were yet more inflections of verbs, passives alongside actives, subjunctives alongside indicatives, imperatives, present and past participles, gerunds and gerundives.
    • By the way, they discuss many different kinds of bias on the part of the news agency, not just choice between actives and passives.
    1. 1.1the active The active voice.
      Example sentencesExamples
      • Tracy has turned the passive into the active; she is a thrill seeker.
      • Never use the passive where you can use the active.

Origin

Middle English (in the sense ‘preferring action to contemplation’): from Latin activus, from act- ‘done’, from the verb agere.

 
 
随便看

 

英语词典包含464360条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/1/27 14:15:21