| 释义 |
stratum/ˈstrɑ:təm, ˈstreitəm/n. (pl. strata /-tə/) 1 esp. Geol. a layer or set of successive layers of any deposited substance (尤)【地质】地层 2 an atmospheric layer 大气层 3 a layer of tissue etc. (组织等的)层 4a a social grade, class, etc. 社会阶层 the various strata of society 社会的不同阶层 b Statistics each of the groups into which a population is divided in stratified sampling 【统计学】(在进行人口统计分层取样时的一个)分类 □ stratal adj.[Latin, = something spread or laid down, neut. past part. of sternere ‘strew’]■ Usage 用法说明 It is incorrect (though a common error) to use strata, the plural form, for the singular stratum, i.e. it is correct to say This stratum (not strata) of society has always exercised power. 把表示复数的 strata 当作单数 stratum 来用是不正确的，虽然这个错误非常普遍，即正确的说法是 This stratum (而非 strata) of society has always exercised power (这个社会阶层总是行使权力)。 |