"Stratum" refers to a layer or series of layers of rock, or a level or class in society.
“Stratum”指岩层、地层或社会阶层。
| 单词 | stratum |
|---|---|
| 音标 | [ˈstrɑ:təm] [ˈstreɪtəm] |
| 释义 | n.["岩层","地层","社会阶层"] |
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