他们进行了一项为期五年的关于野生动物与农业关系的研究。

They conducted a five-year study of the relationship between wildlife and farming.

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They conducted a five-year study of the relationship between wildlife and farming.

study 是名词,意思是"研究、调查",指对某个主题或问题进行系统性的考察和分析。

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