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stratum 'streitәm

TOEFL GRE 柯林斯1⭐

释义

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

复数: strata

BNC词频排名: 8,071 | 当代语料库词频排名: 11,902