stratum

释义

n. 层, 地层, 阶层\n[医] 层 stratum corneum 角质层；角层；角化层 bearing stratum ［工程］承重层

例句

people of different social strata

各个社会阶层的人

Contained within the rock strata is evidence that the region was intensely dry 15,000 years ago.

岩层中的证据表明该地区在15,000 年前曾经非常干旱。