This article includes the bellowing parts: the introduction, mainly elaborates the selected topic, the research background, the theory basis as well as the research technique.
本文包括以下部分：绪论主要阐述选题目的、研究背景、理论依据以及研究方法。
This article mainly includes five parts: the first chapter is an introduction of the background and meaning of the topic selected of this thesis, and the research paths.
本文的内容主要包括五个部分：第一章为绪论，主要对本文选题的背景和意义、研究思路进行了阐述。
Chapter 1 is introduction, elaborating topic selected background, literature reviewed, the research devised, region studied and data origin.
第一章绪论，阐述本文的选题背景、文献评述、研究构想、研究区域和数据来源。
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