美国鱼类和野生动物管理局对黄石公园的狼群进行了仔细的监控和管理。

The US Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone.

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美国鱼类和野生动物服务局将在一月份做出是否将海象列入《濒危物种法案》清单中的决定。

The U.S. Fish and Wildlife Service expects to make a decision on whether to list the walrus in the Endangered Species Act in January.

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这次锐减是美国鱼类和野生动物管理局决定正式将这种鸟列为濒危物种的主要原因。

The crash was a major reason the U.S. Fish and Wildlife Service decided to formally list the bird as threatened.

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