单词：stratifications
(stratification 的复数) n. 层化, 阶层的形成, 成层
[医] 分层
[医] 分层
plural of stratification
n. the act or process or arranging persons into classes or social strata
n. the condition of being arranged in social strata or classes within a group
n. forming or depositing in layers
n. the act or process or arranging persons into classes or social strata
n. the condition of being arranged in social strata or classes within a group
n. forming or depositing in layers