单词	impulse
释义	impulseim‧pulse /ˈɪmpʌls/ ●○○ noun Word Origin WORD ORIGINimpulse Origin: 1600-1700 Latin impulsus, from the past participle of impellere; ➔ IMPEL Examples EXAMPLES FROM OTHER DICTIONARIES He has to learn to control his violent impulses. It was an outfit that I had bought on impulse, and never worn. My first impulse was to go straight to Henry and tell him my news, but on reflection I thought better of it. The impulse of government all over the world is to control information. EXAMPLES FROM THE CORPUS But it was a vague idea, little more, Neville remembers, than an inchoate impulse. But the crucial challenge is to translate that spontaneous impulse of generosity into a long-term political commitment to prevent more global warming. In Middle-earth, then, both good and evil function as external powers and as inner impulses from the psyche. It takes a lot of wrong-way impulses to start a seizure in normal cortex. On impulse, he reached out and passed his hand through the vapour. Once the impulse is transmitted, the nerve segment recovers to its original state, ready for a new impulse. The first diary entries were no doubt recorded on an impulse, in odd hours in his room in the shophouse. The same ultimate specific impulse therefore applies to all three types of system. Thesaurus Longman Language Activatora sudden feeling of wanting something► urge a sudden strong feeling that you want to do something, especially a feeling that is difficult to control: urge to do something: · She was seized with the urge to drag Alice from her chair and shake her.feel/have an urge: · I felt a sudden urge to tell him all my problems.fight an urge (=try not to do something): · He was fighting the urge to drink as he waited for her to come down.resist an urge (=not do something, even though you want to): · Sheena resisted the urge to get in her car and go home. ► whim a sudden feeling that you would like to do something, especially when this is not sensible or when there is no reason at all to do it: · I don't know why I bought it. I suppose it was just a whim.do something on a whim (=do something because you feel a whim): · I went to visit her on a whim. ► impulse a sudden strong desire to do something before thinking about whether it is the right or sensible thing to do: · My first impulse was to go straight to Henry and tell him my news, but on reflection I thought better of it.· He has to learn to control his violent impulses.on (an) impulse (=because you feel an impulse): · It was an outfit that I had bought on impulse, and never worn. WORD SETS► Biology aerobic, adjectiveafterbirth, nounalgae, nounalimentary canal, nounamber, nounameba, nounamino acid, nounamoeba, nounanaconda, nounanaerobic, adjectiveandrogynous, adjectiveantibody, nounantigen, nounantitoxin, nounappendage, nounarm, nounarmour, nounasexual, adjectiveassimilation, nounatrophy, verbaviary, nounbacteria, nounbacteriology, nounbarnacle, nounbile, nounbinocular vision, nounbio-, prefixbiochemistry, nounbiodegradable, adjectivebiodiversity, nounbiohazard, nounbiological, adjectivebiological clock, nounbiology, nounbiomass, nounbiome, nounbiosphere, nounblind, nounbrain, nounbreathe, verbbreed, verbbreed, nounbreeding, nounbristle, nounbulb, nouncapsule, nouncarbohydrate, nouncarbon dioxide, nouncarnivore, nouncell, nouncellular, adjectivecellulose, nouncentral nervous system, nouncervical, adjectivecholesterol, nounchromosome, nouncirculation, nouncirculatory, adjectiveclass, nounclone, nouncold-blooded, adjectiveconceive, verbconch, nounconnective tissue, nouncopulate, verbcoral reef, nouncornea, nouncoronary, adjectivecorpuscle, nouncortex, nouncortisone, nouncowrie, nouncrab, nouncrawfish, nouncrayfish, nouncreature, nouncross, verbcrossbreed, nounculture, nouncytoplasm, noundecay, verbdecay, noundecompose, verbdefecate, verbdenizen, noundextrose, noundiaphragm, noundigest, verbdigestion, noundigestive, adjectiveDNA, noundorsal, adjectivedry rot, nounduct, noundwarf, noundwarf, adjectiveecological, adjectiveecology, nounecosystem, nounegg, nounejaculate, verbembryo, nounembryonic, adjectiveenzyme, nounepidermis, nounevolution, nounevolutionary, adjectiveexcrement, nounexcrescence, nounexcrete, verbexcretion, nounexhale, verbexoskeleton, nounextinction, nounfaeces, nounfamily, nounfang, nounfat, nounfatty acid, nounfauna, nounfeces, nounfeed, verbfemale, adjectivefemale, nounferment, verbferment, nounfertile, adjectivefertility, nounfertilize, verbfission, nounflank, nounflatulence, nounflesh, nounfleshy, adjectiveflightless, adjectiveflora, nounfoetal, adjectivefoetus, nounfoliage, nounfossil, nounfreak, nounfreshwater, adjectivefructose, noungamete, nounganglion, noungene, noungene pool, noungenera, genetic, adjectivegenetic code, noungenetic engineering, noungenetic fingerprinting, noungenetics, noungenome, noungenus, noungestation, noungland, nounglandular, adjectiveglucose, noungluten, noungonad, noungrass snake, noungrow, verbgrowth, nounhabitat, nounhaemoglobin, nounhearing, nounheart, nounhemisphere, nounherbivore, nounhereditary, adjectiveheredity, nounhermaphrodite, nounhibernate, verbhistamine, nounhoming, adjectivehormone, nounhost, nounimpregnate, verbimpulse, nounincubate, verbindigenous, adjectiveinfected, adjectiveinfertile, adjectiveinfest, verbingest, verbinhale, verbinseminate, verbinsensate, adjectiveinsulin, nounintegument, nounintercourse, nouninterferon, nounintestine, nouninvertebrate, nouninvoluntary, adjectiveiris, nounjaw, nounjelly, nounkidney, nounkrill, nounlactate, verblactation, nounlactic acid, nounleech, nounleg, nounlesser, adjectivelichen, nounlife, nounlife cycle, nounlife form, nounligament, nounlimb, nounlimpet, nounlipid, nounliver, nounliving fossil, nounlocomotion, nounlymph, nounlymph node, nounmale, adjectivemale, nounmammal, nounmandible, nounmate, nounmate, verbmembrane, nounmetabolism, nounmetabolize, verbmetamorphosis, nounmicrobe, nounmicrobiology, nounmicroorganism, nounmicroscopic, adjectivemigrate, verbmigratory, adjectivemiscarriage, nounmolar, nounmorphology, nounmotor, adjectivemould, nounmouth, nounmucous membrane, nounmucus, nounmulticellular, adjectivemuscle, nounmuscular, adjectivemutant, nounmutate, verbmutation, nounnatural history, nounnatural selection, nounnature, nounneck, nounnectar, nounnerve, nounnervous, adjectivenervous system, nounneural, adjectiveneuro-, prefixneurology, nounnode, nounnose, nounnostril, nounnucleic acid, nounnucleus, nounnutrient, nounnutriment, nounoesophagus, nounoestrogen, nounolfactory, adjectiveoptic, adjectiveorgan, nounorganic, adjectiveorganic chemistry, nounorganism, nounorifice, nounossify, verbosteo-, prefixoutgrowth, nounova, ovary, nounoverwinter, verboviduct, nounoviparous, adjectiveovulate, verbovum, nounparasite, nounpathogen, nounpedigree, nounpelvic, adjectivepelvis, nounpenile, adjectivepenis, nounpepsin, nounperiod, nounperspiration, nounperspire, verbphotosynthesis, nounphylum, nounpigment, nounpigmentation, nounplankton, nounplasma, nounpollinate, verbpostnatal, adjectivepregnancy, nounpregnant, adjectivepremature, adjectiveprenatal, adjectiveproduct, nounproliferation, nounpropagate, verbprotein, nounprotoplasm, nounprotozoan, nounpuberty, nounpulmonary, adjectivepulp, nounpulsation, nounputrefy, verbputrid, adjectivered blood cell, nounregurgitate, verbrenal, adjectivereproduce, verbreproduction, nounreproductive, adjectiverespiration, nounrespiratory, adjectiverespire, verbretina, nounroot, nounrot, verbrot, nounruff, nounsac, nounsaliva, nounsalivary gland, nounsalivate, verbsaltwater, adjectivescale, nounscallop, nounscaly, adjectivesebaceous, adjectivesecrete, verbsecretion, nounsemen, nounsense organ, nounsensory, adjectiveserum, nounsex, nounsex, verbsexless, adjectivesexual intercourse, nounsheath, nounshell, nounsibling, nounskeletal, adjectiveskeleton, nounskin, nounskull, nounspasm, nounspasmodic, adjectivespecies, nounspecimen, nounsperm, nounspiderweb, nounspinal cord, nounspine, nounspineless, adjectivestarch, nounstem cell, nounstimulate, verbstimulus, nounstrain, nounsubject, nounsubspecies, nounsucker, nounsucrose, nounsweat, verbsweat, nounsweat gland, nounsymbiosis, nounsystemic, adjectivetail, nountaxonomy, nounteeth, testosterone, nountest-tube baby, nountissue, nountrachea, nountube, noununicellular, adjectiveurethra, nounuric, adjectiveurinate, verburine, nounvariety, nounvector, nounvein, nounvenom, nounvenomous, adjectiveventricle, nounvertebra, nounvertebrate, nounvivisection, nounwarm-blooded, adjectivewean, verbwildlife, nounwindpipe, nounyolk, noun Collocations COLLOCATIONS FROM THE ENTRYadjectives► strong · He had a strong impulse to punch Stan in the face. ► irresistible (=very strong)· I felt an irresistible impulse to giggle. ► a sudden impulse · She felt a sudden impulse to play some music. ► somebody's first/initial impulse · Her first impulse was to turn and walk away. ► a natural impulse · My natural impulse was to shout for help. verbs► have/feel an impulse to · Rosa had an impulse to tell Henry the truth. ► resist/control an impulse (=not do something, even though you have an impulse to do it)· Derek resisted the impulse to eat any more cake. ► act on an impulse (=do something because you have a sudden desire to do it)· Acting on an impulse, he decided to visit his sister. ► obey an impulse formal (also yield to an impulse literary) (=do something because you have a sudden very strong desire to do it)· Yielding to an impulse, she called him on her mobile phone. impulse + NOUN► an impulse buy (=buying something without having planned it)· She admitted that the necklace had been an impulse buy. phrases► do something on impulse (=do something without having planned it)· James bought her some flowers on impulse. COLLOCATIONS FROM OTHER ENTRIES► resist the urge/impulse to do something · Bob resisted the urge to touch her hand. COLLOCATIONS FROM THE CORPUSADJECTIVE► aggressive · How and when does the child learn to control his aggressive impulses?· That you suppress your aggressive impulses? ► electrical · In nervous communication, messages are carried as electrical impulses in nerve fibres.· I felt as though I was stuck in this network or maze of electrical impulses.· My face seemed to be made up of a mass of needles or spikes or electrical impulses.· Here 130 million light-sensitive rods and cones cause photochemical reactions which transform the light into electrical impulses.· All living organisms produce electrical impulses on an infinitesimal scale.· In electronics, a spiral is used to convert radio waves into electrical impulses.· It also sends electrical impulses into this poor mutt's brains to control its actions.· This is then amplified by photomultiplier tubes and converted into electrical impulses. ► natural · This encouraged the natural impulse to whistle, and led in turn to the use of instrumental whistles emitting high-frequency sound.· They were businessmen and found it difficult to restrain their natural impulse to boosterism.· The natural impulses of mankind were for happiness, and we were predisposed to love one another and love peace.· This is a natural impulse, and it often ensures a basic fairness in public systems. ► specific · This is largely because of the limitations on the specific impulse obtainable from chemical means.· This option is therefore extremely wasteful of resources, compared to any of the three options with lower specific impulse.· The ion engine has considerable potential as it is capable of generating specific impulses of thousands of seconds.· These factors force chemical rockets to deliver specific impulses well below five hundred seconds.· If the specific impulse could be increased towards 1000 seconds this would have a dramatic effect on the mass ratio required.· The Titan was designed to use only storable propellants, at the price of somewhat inferior specific impulse.· Increasing the specific impulse implies producing a greater exhaust velocity.· The same ultimate specific impulse therefore applies to all three types of system. ► sudden · Acting on a sudden impulse, he turned.· He felt a sudden sharp impulse to look to his left, but controlled it, his eyes never leaving the Empress.· She never, as she had done in ètanjel, went to visit families on sudden impulse.· She fought against the sudden unexplainable impulse to tell him everything, to lighten the heavy burden of grieving alone. NOUN► nerve · The breakdown of the insulation layer short-circuits nerve impulses and produces devastating consequences.· First of all, the brain controls many bodily functions, either directly via nerve impulses or indirectly via hormones.· More effective drugs had their origin in the basic research on chemical transmission of nerve impulses described in chapter 4.· This traveling wave of altered electrical potential is called an action potential, more commonly known as a nerve impulse.· The sensation only occurs when the nerve impulse reaches the brain.· Many animals have a single lens used to focus light on to a plate able to convert it into nerve impulses.· To jump over the gap between two cells, a nerve impulse has to be translated from electricity to chemicals and back.· The unlocking of the receptor leads to the creation or suppression of a nerve impulse in the second cell. VERB► act · The Commissioner had, according to Namaliu, been under observation for some time before acting on impulse and alone. ► buy · He had made the offer to buy Sara out on impulse.· It's always tempting when visiting an aquatic outlet to buy on impulse.· Not all postcards are bought on impulse.· People often buy on impulse while they are queueing to pay. 6 Related goods are usually displayed near to each other.· Resist the temptation to buy on impulse, just because an outfit catches the eye.· If you love plants, the chances are you buy them on impulse and then wonder where to put them. ► control · How and when does the child learn to control his aggressive impulses?· The first step is to let the husband grow up and take responsibility for controlling his impulses.· They will not in this way learn to control those impulses which lead them to transgress.· However, it was also shown that this gate mechanism was controlled by impulses descending from the brain. ► feel · He felt a sudden sharp impulse to look to his left, but controlled it, his eyes never leaving the Empress.· One of the first, and surely the most important, of those to feel these impulses was President Truman.· I felt an impulse to flee from the cottage in the early morning and stay out of it until dusk.· Then the control relaxed; he felt no impulse to do anything, except to stand and wait. ► fight · Hazel and Fiver stared at each other, both fighting against the impulse to run.· Robbie had to fight down an impulse to reach out and run her fingers over the dark mat. ► resist · Now you try this exercise, and resist the impulse to give up.· He resisted an impulse to stand on a chair.· Bragg could not resist the impulse to stroll over.· Jean was unable to resist the impulse to return her smile. 1[countable, uncountable] a sudden strong desire to do something without thinking about whether it is a sensible thing to do SYN  urgeimpulse to do something a sudden impulse to laugh Marge’s first impulse was to run. Gerry couldn’t resist the impulse to kiss her.on impulse On impulse, I picked up the phone and rang her. Most beginners buy plants on impulse and then hope for the best.impulse buying/shopping (=when you buy things that you had not planned to buy)2[countable] technical a short electrical signal that travels in one direction along a nerve or wire:  The eye converts light signals to nerve impulses.3[countable] a reason or aim that causes a particular kind of activity or behaviour:  It is the passions which provide the main impulse of music.COLLOCATIONSadjectivesstrong· He had a strong impulse to punch Stan in the face.irresistible (=very strong)· I felt an irresistible impulse to giggle.a sudden impulse· She felt a sudden impulse to play some music.somebody's first/initial impulse· Her first impulse was to turn and walk away.a natural impulse· My natural impulse was to shout for help.verbshave/feel an impulse to· Rosa had an impulse to tell Henry the truth.resist/control an impulse (=not do something, even though you have an impulse to do it)· Derek resisted the impulse to eat any more cake.act on an impulse (=do something because you have a sudden desire to do it)· Acting on an impulse, he decided to visit his sister.obey an impulse formal (also yield to an impulse literary) (=do something because you have a sudden very strong desire to do it)· Yielding to an impulse, she called him on her mobile phone.impulse + NOUNan impulse buy (=buying something without having planned it)· She admitted that the necklace had been an impulse buy.phrasesdo something on impulse (=do something without having planned it)· James bought her some flowers on impulse.
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