stratum
'streitәm
基本解释
n. 层, 地层, 阶层
[医] 层
英文释义
n. one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
词形变化
上一个单词：Stratton
下一个单词：stratum aculeatum