We must strengthen the study of guidance theory, middle class, stratum dividing research with society justice and so on, if we want to make the stratum dividing research move forward deeply.
要使社会学的研究走向深入，就必须加强阶层研究的指导理论、中间阶层、社会分层与社会公平等方面的研究。
We should strengthen the study of middle class, stratum dividing research with society justice and so on, if we want to make the stratum dividing research move toward deeply.
要使社会学的研究走向深入，就必须加强中间阶层、社会分层与社会公平等方面的研究。
Secondly, the part defines some concepts, such as class, stratum, intermediate stratum, middle stratum, middle class, social resource, etc.
其次是界定了阶级与阶层、中间阶层、中产阶层与中产阶级、社会资源等概念。
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