In the first chapter, the background and the current situation are expounded firstly.
第一章阐述课题的研究背景和目前的研究现状。
The first part is introduction, expounded the basic train of thought of this paper.
第一部分为导论，阐述了本文的基本思路。
The first part is introduction, expounded the basic train of thought of this paper.
第一部分为导论，阐述了本文的基本思路。
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