首先，是以列举和类比的方式进行介绍自然法的概念，这是本部分的重点。

First, be that the way with enumeration and analogy carries out the concept introducing natural law's, this is this part priority.

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采用文献资料法、统计分析法、类比法等，探讨了自然地理环境与高原训练间的关系。

Adopting the methods of literature and data, statistical analysis and type comparing, the relationship between geographical conditions and altitude training is studied.

youdao

采用文献资料法、统计分析法、类比法等，探讨了自然地理环境与高原训练间的关系。

Adopting the methods of literature and data, statistical analysis and type comparing, the relationship between geographical conditions and altitude training is studied.

youdao