It expounds from two aspects: the background to the study and the purpose of the paper.

从研究的背景和论文的目的两个方面进行阐述。

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Chapter one offers the background to the study of debate, along with its purpose and research method.

第一章介绍了辩论相关研究的背景、目的和研究方法。

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Chapter One introduces the background to the study, and expounds the purpose and significance of this study.

第一章介绍研究背景，并阐述研究的目的和意义。

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Most of the men and women in the study came from a similar background, meaning the results may not apply to everyone.

BBC: People can be fat yet fit, research suggests