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单词 expansion
释义

expansion


ex·pan·sion

E0282400 (ĭk-spăn′shən)n.1. a. The act or process of expanding: the new nation's expansion westward.b. The state of being expanded.2. a. An expanded part: an expansion of a river.b. A product of expanding: a book that is an expansion of the author's PhD thesis.3. The extent or amount by which something has expanded.4. Mathematics a. A quantity written in an extended form, such as in a sum or product of terms.b. The process of obtaining this form.5. An expanse.6. A period of increased economic or business activity.

expansion

(ɪkˈspænʃən) n1. the act of expanding or the state of being expanded2. something expanded; an expanded surface or part3. the degree, extent, or amount by which something expands4. an increase, enlargement, or development, esp in the activities of a company5. (Mathematics) maths a. the form of an expression or function when it is written as the sum or product of its termsb. the act or process of determining this expanded form6. (Mechanical Engineering) the part of an engine cycle in which the working fluid does useful work by increasing in volume7. (Mechanical Engineering) the increase in the dimensions of a body or substance when subjected to an increase in temperature, internal pressure, etc exˈpansionary adj

ex•pan•sion

(ɪkˈspæn ʃən)

n. 1. the act or process of expanding. 2. the state or quality of being expanded. 3. the amount or degree of expanding. 4. an expanded portion or form of a thing. 5. expanse. 6. the development at length of an expression indicated in a contracted form, as a2 + 2ab + b2 for the expression (a + b)2. 7. an increase in economic and industrial activity (opposed to contraction). [1605–15; < Late Latin] ex•pan′sion•al, adj.

ex·pan·sion

(ĭk-spăn′shən)1. An increase in size, volume, or quantity, usually due to heating. When substances are heated, the molecular bonds between their particles are weakened, and the particles move faster, causing the substance to expand.2. A number or other mathematical expression written in an extended form; for example, a2 + 2ab + b2 is the expansion of (a + b)2.
Thesaurus
Noun1.expansion - the act of increasing (something) in size or volume or quantity or scopeexpansion - the act of increasing (something) in size or volume or quantity or scopeenlargementstep-up, increase - the act of increasing something; "he gave me an increase in salary"dilatation, dilation - the act of expanding an aperture; "the dilation of the pupil of the eye"distension, distention - the act of expanding by pressure from withinstretching - act of expanding by lengthening or wideninginflation - the act of filling something with airmagnification - the act of expanding something in apparent sizeextension - act of expanding in scope; making more widely available; "extension of the program to all in need"contraction - the act of decreasing (something) in size or volume or quantity or scope
2.expansion - a function expressed as a sum or product of terms; "the expansion of (a+b)^2 is a^2 + 2ab + b^2"math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangementfunction, mapping, mathematical function, single-valued function, map - (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
3.expansion - a discussion that provides additional informationelaboration, enlargementdiscussion, discourse, treatment - an extended communication (often interactive) dealing with some particular topic; "the book contains an excellent discussion of modal logic"; "his treatment of the race question is badly biased"expatiation - a discussion (spoken or written) that enlarges on a topic or theme at length or in detailembellishment, embroidery - elaboration of an interpretation by the use of decorative (sometimes fictitious) detail; "the mystery has been heightened by many embellishments in subsequent retellings"
4.expansion - adding information or detailexpanding uponstep-up, increase - the act of increasing something; "he gave me an increase in salary"amplification, elaboration - addition of extra material or illustration or clarifying detail; "a few remarks added in amplification and defense"; "an elaboration of the sketch followed"annotating, annotation - the act of adding notessubjoining, subjunction, supplementation - the act of supplementing

expansion

noun1. increase, development, growth, spread, diffusion, magnification, multiplication, amplification, augmentation the rapid expansion of private health insurance2. enlargement, inflation, increase, growth, swelling, unfolding, expanse, unfurling, opening out, distension Slow breathing allows for full expansion of the lungs.

expansion

noun1. The act of increasing in dimensions, scope, or inclusiveness:enlargement, extension, spread.2. A wide and open area, as of land, sky, or water:distance, expanse, extent, reach, space, spread, stretch, sweep.
Translations
扩张

expand

(ikˈspand) verb to make or grow larger; to spread out wider. Metals expand when heated; He does exercises to expand his chest; The school's activities have been expanded to include climbing and mountaineering. 擴大,擴張 扩大exˈpanse (-s) noun a wide area or extent. an expanse of water. 廣闊,浩瀚 广阔(的区域) exˈpansion (-ʃən) noun the act or state of expanding. the expansion of metals. 擴張 扩张
See expansion

expansion


expansion,

in physics, increase in volume resulting from an increase in temperature. Contraction is the reverse process. When heat is applied to a body, the rate of vibration and the distances between the molecules composing it are increased and, hence, the space occupied by the body, i.e., its volume, increases. This increase in volume is not constant for all substances for any given rise in temperature, but is a specific property of each kind of matter. For example, zinc and lead undergo greater expansion in a one-degree rise in temperature than do silver or brass. Since solidssolid,
one of the three commonly recognized states in which matter occurs, i.e., that state, as distinguished from liquid and gas, in which a substance has both a definite shape and a definite volume.
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 have a definite shape, each linear dimension of the solid increases by a proportional amount for a given temperature increase. The amount that a unit length along any direction of a substance increases for a temperature increase of one degree is called the coefficient of linear expansion of the substance. Most liquids also expand when heated. However, since liquids do not have a definite shape, it is the expansion of their volume as a whole that is relevant rather than the increase in a linear dimension. The amount of expansion that a unit volume (e.g., a cubic centimeter or a cubic foot) of any substance undergoes per one-degree rise in temperature is called its volume coefficient or coefficient of cubical expansion and is listed as a property of that substance. The coefficient of linear expansion can be calculated by dividing the coefficient of cubical expansion of the substance by three. When the amount of expansion of a given length of a substance has been determined experimentally, the linear coefficient is calculated by dividing the total amount of expansion by the product of the original number of length units and the number of degrees of rise in temperature. Gases also exhibit thermal expansion. The coefficient of expansion is about the same for all the common gases at ordinary temperatures; it is 1-273 of the volume at 0&degC; per degree rise in temperature. The Kelvin, or absolute, scale is based upon this behavior (see Kelvin temperature scaleKelvin temperature scale,
a temperature scale having an absolute zero below which temperatures do not exist. Absolute zero, or 0&degK;, is the temperature at which molecular energy is a minimum, and it corresponds to a temperature of −273.
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). Charles's law concerning the expansion of gases states that the volume of a gas is directly proportional to its absolute temperature (see gas lawsgas laws,
physical laws describing the behavior of a gas under various conditions of pressure, volume, and temperature. Experimental results indicate that all real gases behave in approximately the same manner, having their volume reduced by about the same proportion of the
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). Liquids differ from each other as do solids in their expansion coefficients. Water, unlike most substances, contracts rather than expands as its temperature is increased from 0&degC; to 4&degC;; above 4&degC; it exhibits normal behavior, expanding as the temperature increases.

expansion

[ik′span·shən] (electronics) A process in which the effective gain of an amplifier is varied as a function of signal magnitude, the effective gain being greater for large signals than for small signals; the result is greater volume range in an audio amplifier and greater contrast range in facsimile. (mathematics) The expression of a quantity as the sum of a finite or infinite series of terms, as a finite or infinite product of factors, or, in general, in any extended form. (mechanical engineering) Increase in volume of working material with accompanying drop in pressure of a gaseous or vapor fluid, as in an internal combustion engine or steam engine cylinder. (physics) Process in which the volume of a constant mass of a substance increases.

expansion

The increase in length or volume of a material, or a body, caused by temperature, moisture, or other environmental condition.

expansion

1. Mathsa. the form of an expression or function when it is written as the sum or product of its terms b. the act or process of determining this expanded form 2. the part of an engine cycle in which the working fluid does useful work by increasing in volume 3. Physics the increase in the dimensions of a body or substance when subjected to an increase in temperature, internal pressure, etc.

expansion


ex·pan·sion

(eks-pan'shŭn), 1. An increase in size as of chest or lungs. 2. The spreading out of any structure (for example, a tendon)). 3. An expanse; a wide area. [L. ex-pando, pp. -pansus, to spread out]

ex·pan·sion

(eks-pan'shŭn) 1. An increase in size as of chest or lungs. 2. The spreading out of any structure, as a tendon. 3. An expanse; a wide area. [L. ex-pando, pp. -pansus, to spread out]

ex·pan·sion

(eks-pan'shŭn) 1. An increase in size as of chest or lungs. 2. Spreading out of any structure (e.g., a tendon). [L. ex-pando, pp. -pansus, to spread out]

Expansion


Expansion

Phase of the business cycle as it climbs from a trough toward a peak.

Expansion

In a business cycle, a period of growth during which an economy moves from its trough to its peak. For example, if an economy dips to growth of -2.5% and then recovers to 3% growth, this period is called expansion. It is considered a normal and inevitable part of a business cycle following a recession or other contraction. Expansion is also called recovery.
AcronymsSeeexpense

expansion


Related to expansion: Binomial expansion, Thermal expansion, Taylor expansion
  • noun

Synonyms for expansion

noun increase

Synonyms

  • increase
  • development
  • growth
  • spread
  • diffusion
  • magnification
  • multiplication
  • amplification
  • augmentation

noun enlargement

Synonyms

  • enlargement
  • inflation
  • increase
  • growth
  • swelling
  • unfolding
  • expanse
  • unfurling
  • opening out
  • distension

Synonyms for expansion

noun the act of increasing in dimensions, scope, or inclusiveness

Synonyms

  • enlargement
  • extension
  • spread

noun a wide and open area, as of land, sky, or water

Synonyms

  • distance
  • expanse
  • extent
  • reach
  • space
  • spread
  • stretch
  • sweep

Synonyms for expansion

noun the act of increasing (something) in size or volume or quantity or scope

Synonyms

  • enlargement

Related Words

  • step-up
  • increase
  • dilatation
  • dilation
  • distension
  • distention
  • stretching
  • inflation
  • magnification
  • extension

Antonyms

  • contraction

noun a function expressed as a sum or product of terms

Related Words

  • math
  • mathematics
  • maths
  • function
  • mapping
  • mathematical function
  • single-valued function
  • map

noun a discussion that provides additional information

Synonyms

  • elaboration
  • enlargement

Related Words

  • discussion
  • discourse
  • treatment
  • expatiation
  • embellishment
  • embroidery

noun adding information or detail

Synonyms

  • expanding upon

Related Words

  • step-up
  • increase
  • amplification
  • elaboration
  • annotating
  • annotation
  • subjoining
  • subjunction
  • supplementation
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更新时间:2025/2/7 14:55:57