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.

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