| 单词 | variable |
| 释义 | variable (once / 231 pages) nadj The adjective variable is used to describe something that is liable to change often, such as the weather, interest rates, or your teacher's mood. If you mention the noun variable to people who are math-phobic, you may give them nightmares because they don't like to think about numbers or values that can change in equations. The adjective form of variable has been around since the late 1300s, applying first to people, and then, in the late 1400s, to weather. The noun form first appeared in Lacroix's Differential and Integral Calculus in 1816, guaranteeing that math students would be solving for the variable x for generations to come. WORD FAMILYvariable: invariable, variability, variableness, variables, variably+/invariable: invariability, invariableness, invariables, invariably/invariant: invariance, invariants/unvaried: unvariedly, unvariedness/unvarying: unvaryingly/variability: variabilities/variance: variances/variant: invariant, variance, variantly, variants/variate: bivariate, multivariate, variates/variation: covariation, variations/varied: unvaried, variedly, variedness/vary: co-vary, variable, variant, variate, variation, varied, varies, varying/varying: unvarying, varyingly USAGE EXAMPLESCrosscultural variables, in fact, are at the heart of this seriocomic philosophical inquiry into peace and discord. New York Times(Jan 02, 2017) Sure, those shops played a role, but so did the climate, the political situation and a host of other variables. Washington Post(Dec 29, 2016) There are too many variables at play for there to be a universally ideal day to buy an airline ticket. New York Times(Dec 29, 2016) 1n something that is likely to vary; something that is subject to variation the weather is one variable to be considered Hyper thing a separate and self-contained entity 2n a quantity that can assume any of a set of values Syn|Hypo|Hyper variable quantity argument a variable in a logical or mathematical expression whose value determines the dependent variable; if f(x)=y, x is the independent variable experimental variable, independent variable(statistics) a variable whose values are independent of changes in the values of other variables correlate, correlativeeither of two or more related or complementary variables degree of freedom(statistics) an unrestricted variable in a frequency distribution dependent variable(statistics) a variable in a logical or mathematical expression whose value depends on the independent variable predictor variablea variable that can be used to predict the value of another variable (as in statistical regression) infinitesimal(mathematics) a variable that has zero as its limit chance variable, random variable, stochastic variable, variant, variatea variable quantity that is random scalara variable quantity that cannot be resolved into components tensora generalization of the concept of a vector vectora variable quantity that can be resolved into components factoran independent variable in statistics cross product, vector producta vector that is the product of two other vectors resultant, vector suma vector that is the sum of two or more other vectors radius vectora line connecting a point in space to the origin of a polar coordinate system radius vectora line connecting a satellite to the center of the body around which it is rotating quantity the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable 3n a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity Hypo|Hyper placeholder a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set unknown, unknown quantitya variable whose values are solutions of an equation symbol an arbitrary sign (written or printed) that has acquired a conventional significance 4n a star that varies noticeably in brightness Syn|Exp|Hyper variable star North Star the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it star (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior 5adj marked by diversity or difference nature is infinitely variable Syn varying varied characterized by variety 6adj liable to or capable of change rainfall in the tropics is notoriously variable variable winds variable expenses Syn|Ant inconsistent displaying a lack of consistency inconstantlikely to change frequently often without apparent or cogent reason; variable changeable, uncertain, unsettledsubject to change covariantchanging so that interrelations with another variable quantity or set of quantities remain unchanged multivariatepertaining to any procedure involving two or more variables proteantaking on different forms shiftingcontinuously varying variantexhibiting variation and change versatilechangeable or inconstant invariable not liable to or capable of change consistent(sometimes followed by `with') in agreement or consistent or reliable constantsteadfast in purpose or devotion or affection changeless, constant, invariant, unvaryingunvarying in nature hard-and-fast, strict(of rules) stringently enforced invariantunaffected by a designated operation or transformation 7adj (used of a device) designed so that a property (as e.g. light) can be varied a variable capacitor variable filters in front of the mercury xenon lights Syn adaptable capable of adapting (of becoming or being made suitable) to a particular situation or use |
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