Part II: Basic concepts and theoretical basis.
第二部分，基本概念及理论基础。
Part III is to explain the concepts and theoretical basis.
第三章是概念阐释及理论依据。
This article first introduces the relevant concepts and theoretical basis of theme.
本文首先介绍了相关的概念和理论基础；
This article first introduces the relevant concepts and theoretical basis of theme.
本文首先介绍了相关的概念和理论基础；
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