某些种类的北极鸟受到近来雪雁数量急剧增加的威胁，这些雪雁在北极繁殖，并且正在取代生命力较弱的鸟类。

Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species.

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不过费雪对罗斯福决策充其量只有极微小的影响力，他的名声跌落如此之深，以至学术界的同仁们也对他不屑一顾。

But Fisher had at best a slight influence on Roosevelt's decision. His reputation had fallen so far that even fellow academics ignored him.

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反过来，大英博物馆展出的匿名的雪利画展示出了伊朗丝绸卓越的品质和富有想象力的设计。

In turn, the extraordinary detail of the anonymous Shirley portraits at the British Museum illustrates the superb quality and imaginative designs of the best Iranian silks.

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