本文分五部分内容：第一章，介绍本文的相关研究背景。
There are five parts in this thesis. Chapter One introduces related research backgrounds.
论文主要包括以下五部分内容：第一部分是研究问题的阐述。
The paper is mainly divided into the following five parts: the first part is an elaboration of the research.
论文主要包括以下五部分内容：第一部分是研究问题的阐述。
The paper includes the following five parts: the first part is the elaboration of study question.
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