What happens is that the ice at the base of the glacier is under a great deal of pressure—the pressure coming from the weight of the overlying ice.

实际情况是，冰川底部的冰承受着巨大的压力——这些压力来自于覆盖在上面的冰的重量。

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A liquid layer forms at the base of the glacier.

在冰川的底部形成了一层液体。

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Crevasses can form in this upper layers of the glacier.

冰川的上层会形成裂缝。

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Some places like Australia's Great Barrier Reef and Montana's Glacier National Park are threatened by the effects of climate change.

VOA: special.2009.04.22

In the United States, the icy masses in Glacier National Park in Montana may soon completely disappear because of climate change.

VOA: special.2009.04.22

The last glacier covered large areas of what is now the northeastern United States about 20,000 years ago.

VOA: special.2009.01.05

Volcanic processes disturbed the mass balance of the glacier, thereby accelerating the ablation processes.

UNESCO: Dublin Core

The edge of the glacier slopes up to the height of a two-storey house.

BBC: The perfect trip: Switzerland

These then transport the water from the top to the underside of the glacier.

CNN: Rubber ducks aid NASA study