Social stratification, where social class is strictly defined and enforced, and social mobility is non - existent (see caste system).

社会阶层化，当社会阶级被严格的定义以及执行而且社会流动根本不存在(参照种姓制度)。

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The process of attaining professional status is actually a ail-along focus in the study of social stratification and social mobility.

职业地位的获得过程一直以来都是社会分层与流动研究中很重要的一个焦点问题。

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