《动物福利法》是目前美国唯一的相关联邦法案。该法案规定了动物在研究，展览，运输过程中的应受的待遇以及动物贩卖者应如何对待动物。

The animal Welfare Act is the only federal law in the U.S. that regulates the treatment of animals in research, exhibition, transport, and by dealers.

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灰色关联分析法建立在定性分析与定量研究相结合的基础上，是灰色系统理论中用于系统分析的一种基本方法。

Grey relational analysis method, which is a basic method of grey system theory for system analysis, is based on qualitative analysis and quantitative analysis.

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研究方法：主成分分析法、灰关联分析。

Methods of principal component analysis, grey incidence analysis were employed.

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