美国的野生动物官员正试图确定导致阿肯色州的一个小镇上空1000多只乌鸦死亡的原因。

Wildlife officials in the United States are trying to determine what caused more than 1,000 blackbirds to fall dead from the sky over a small town in Arkansas.

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一个小镇遭到了乌鸦的攻击，可是人们却不知道被乌鸦攻击的原因。

A small town is attack by ravens and doesn't know why the ravens are working together.

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