It is a tool for looking at the impact of changes in diet, for example.

测试是一个观察各种因素变化的影响的工具，比如说饮食。

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Looking at the human element, consider what impact the changes will bring.

检查人的因素，考虑更改将带来什么影响。

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Looking at the human element, consider what impact the changes will bring.

检查人的因素，考虑更改将带来什么影响。

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