第一章介绍了研究背景和研究意义。
Chapter One is a general introduction of the research background and significance.
第一部分介绍研究背景和研究意义。
The first part introduces the significance and background of this research.
在本论文第一章中，首先阐述了选题的研究背景和研究意义。
In Chapter one, the backgrounds and significance of the selected topic were illustrated firstly.
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