马重新有引入到美洲(最早由原始美洲人通过白令海峡带来的野马已经灭绝了)，迅速适应并遍布大平原。
The horse was re-introduced to America (as original paleo-American populations of wild horses from the Bering land bridge were extinct) and quickly adapted to free range on the sprawling great plains.
在低低的地平线上的小山中，有鉴识力的眼睛可以看出一个原始的湖沼来，平原没有必要在以后升高，来掩盖它的历史。
Often an inquisitive eye may detect the shores of a primitive lake in the low horizon hills, and no subsequent elevation of the plain have been necessary to conceal their history.
在低低的地平线上的小山中，有鉴识力的眼睛可以看出一个原始的湖沼来，平原没有必要在以后升高，来掩盖它的历史。
Often an inquisitive eye may detect the shores of a primitive lake in the low horizon hills, and no subsequent elevation of the plain have been necessary to conceal their history.
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