A third of this vast region, the world's biggest patch of frozen ground, is covered with lakes that are growing as subterranean ice melts.
随着地下冰层的溶化，这个世界上最大的冻土带有三分之一的地区被这样的湖水覆盖，而且湖水的水量在不断增长。
A third of this vast region, the world's biggest patch of frozen ground, is covered with lakes that are growing as subterranean ice melts.
随着地下冰层的溶化，这个世界上最大的冻土带有三分之一的地区被这样的湖水覆盖，而且湖水的水量在不断增长。
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