释义 |
stra·tumBrE /ˈstrɑːtəm/NAmE /ˈstreɪtəm/ noun (strata BrE /ˈstrɑːtə/ NAmE /ˈstreɪtə/ ) (geology 地质学) a layer or set of layers of rock, earth, etc. 层;岩层;地层(formal) a class in a society 阶层◆people from all social strata 来自不同社会阶层的人 Easily-confused plural/singular forms bacteria/bacterium, criteria/criterion, data/datum, media/medium, phenomena/phenomenon, strata/stratum |