年龄: age年龄级: age class; year class龄级: age-class级差: gradation; stage head龄级表: age-class table龄级期: age-class period等级差: [数学] rank difference◇等级差平方相关 [数学] rank difference square correlation灰级差: grey level difference能级差: energy level difference声级差: sound level difference年龄: age 超过规定年龄 over age; 未达到规定年龄 under age; 应征年龄 age for enlistment; 他的智慧、学识超越他的年龄。 he is wise, learned beyond his years. 这份名单是按年龄顺序排列的。 the list is arranged in years.; 年龄差异 age differences; 年龄构成 [人类学] age structure; 年龄鉴定 age assessment; age determination; 年龄阶段 age level; 年龄结构 age structure [composition]; 年龄群 age set; 年龄特征 [天文学] age characteristics; 年龄性别组成 age-sex structure; 年龄优势 age domination; 年龄组成 age composition; age structure 不稳定龄级: unstable age class法正龄级: normal age-class龄级分布: age class distribution龄级结构: age class structure龄级顺序: gradation of age classes龄级组判读: stand age cla in photo interpretation; stand age class in photo interpretation同龄级木: age class优势龄级: dominant age class等级差别: grade differential分级差的: poorly graded工资级差: wage differential级差地租: differential (land) rent级差电费制: step meter rate级差活塞: differential piston; step piston