单词 stratum 释义 stratum|strtm, stretm|Pl. strata |strt, stret|; 9– rarely stratums.[a. mod.L. use of L. strtum, lit. something spread or laid down (in classical use with the senses ‘bed-cover’, ‘horse-cloth’, ‘pavement’), neut. pa. pple. of ster...
单词 stratum 释义 stratum n (pl strata /-tE; -tE/) 1 any of a series of horizontal layers, esp of rock in the earth´s crust 层; (尤指)岩层. 2 level or class in society (社会的)阶层 a gathering of people from a variety of social strata 不同社会阶...