第一章是导论部分，介绍了写作的由来和意义，并对相关的研究进行了综述，同时介绍了本次调研情况。
The first chapter is the introduction containing the origin and significance of the study, reviewing the related research, introducing the research situation of this paper at the same time.
本文针对饮食中生物抗氧化剂与肺癌预防的相关研究情况进行综述。
In this paper, biological antioxidants in the diet and lung cancer prevention-related research were reviewed.
但迄今为止尚未发现和孤独症特异相关的基因，该文综述了近年来国际上对孤独症侯选基因的定位和研究情况。
However, no autism-specifically associated genes are found now. This article reviewed foreign researches in recent years on localization and correlative analysis of the candidate genes of autism.
但迄今为止尚未发现和孤独症特异相关的基因，该文综述了近年来国际上对孤独症侯选基因的定位和研究情况。
However, no autism-specifically associated genes are found now. This article reviewed foreign researches in recent years on localization and correlative analysis of the candidate genes of autism.
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