一定: fixed; established; regular变异: heteromorphosis; variation; ...一定变异性: definite variability不定变异: adventitious variation不定变异性: indefinite variability确定变异: definitive variation确定变异性: definite variability; definitive variability预定变异: determinant variation; determinate variation; orchogenesis预定变异,定向变异: determinate variation一定: 1.(规定的, 确定的) fixed; established; regular 一定的规章制度 established rules and regulations; 一定的生产指标 fixed production quota; 按照一定的规格进行生产 work according to specifications; 学习、 工作都有一定的时间。 there are fixed times for study and for work.2.(固定不变的) definite; constant 每一种弹簧都有一定的弹性。 every sort of spring has a definite elasticity.3.(必定) surely; certainly; be bound to; necessarily 这一定是他想买的书。 this must be the book he wants to buy. 只要我们做到这一切, 改革就一定能成功。 provided we do all this, we shall assuredly succeed in our reform. 六点以前, 我一定回家。 i shall definitely be home before six o'clock.4.(特定的) certain; specific; given 在一定程度上 to a certain degree; 在一定条件下 under given conditions; 在一定意义上 in a certain sense; 在一定的时期内 within a certain [definite] period; 金属加热到一定的温度都会熔化。 metals will melt when heated to a certain temperature.5.(相当的) proper; fair; due 达到一定水平 reach a fairly high level; 给予一定的重视 attach due importance to变异: [生物学] (同种生物间的性状差异) heteromorphosis; variation; metamorphosis; dissociation◇变异比 variance ratio; 变异点 change point; 变异性 [生; 统] variability; deviancy先定变量 前定变量: predeterminedvariable不定变幅: random fluctuation不定变位: indefinite conjugation测定变量: measured variable定变形试验: constant-deformation tests额定变比: rated transformation ratio; rated travel额定变化: nominal transformation额定变换率: nominal transformation ratio非锁定变换: non locked conversion固定变换器: fixed converter固定变量: fixed variable; fixedvariable固定变益率: constant return可指定变差: assignable variation锚定变形: anchorage deformation
