The combination of physics stratification teaching with the class teaching of "problem-research" could enhance the efficiency of physics teaching.
物理分层教学与“问题——研究”课堂教学模式的有机结合能有效地提高物理教学的效率。
In the study of social stratification, scholars focus more on the income of the middle class in large cities, education, social status and other aspects of differentiation.
在社会分层研究中，学者们更注重大城市中产阶层的收入、受教育程度、社会地位等方面的分化。
The chapter analysed two important concepts of the study of social stratification, class and stratum.
此章主要分析了社会分层研究中的两个重要概念——阶级和阶层。
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)。
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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