而美国东南部地区正是世界上各种淡水动物物种集聚的中心，以阿巴拉契亚山脉南部山区为其中的典型。

But it is the American Southeast that stands out as a world centerof freshwater-species diversity, especially the southern AppalachianMountains.

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但是美国东南部，尤其是阿巴拉契亚山脉南部，却脱颖而出成为世界淡水生物聚居中心。

But it is the American Southeast that stands out as a world center of freshwater-species diversity, especially the southern Appalachian Mountains.

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