A 2009 study found that the Greenland ice sheet shed roughly 385 cubic miles of ice over the previous seven years.

2009年的一项研究发现，此前七年间格陵兰冰盖差不多融掉了385立方英里。

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But the real value of the project will be the ability to map changes in the thickness of the sea ice over time, as further maps are produced.

但是该项目的真正价值是，随着更多地图的出炉，可以绘制海冰厚度随时间变化的地图。

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Glaciers are simply accumulated snow, packed densely into ice over thousands, even millions, of years.

冰川是经过数千年甚至数百万年累积而成的浓密冰雪。

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Glaciers are simply accumulated snow, packed densely into ice over thousands, even millions, of years.

冰川是经过数千年甚至数百万年累积而成的浓密冰雪。

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