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There was a apparently society stratification in ancient society of China.
中国古代社会分层明显，社会差异很大。
youdao
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She was concerned about the stratification of American society.
她以前很关注美国社会的阶层分化。
《柯林斯英汉双解大词典》
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She was concerned about the stratification of American society.
她以前很关注美国社会的阶层分化。
《柯林斯英汉双解大词典》