He said that further warming could trigger polar ice cap melting.

他说进一步的变暖可能触发极地冰帽融化。

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Much has been made about conflicts between Arctic states because of a retreating polar ice cap, which will make many natural resources accessible for the first time.

极地冰冠后退在环北极国家中引发了热议。 随着冰冠消融，下面蕴藏的丰富自然资源将首次浮出水面。

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The other bright region in the image is the polar ice cap over the Arctic Ocean.

图中另一块明亮的区域则是北冰洋的极地冰冠。

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The 13-day trek across the frozen polar ice cap was in aid of the charity Walking With The Wounded which supports injured ex-servicemen and women.

BBC: Prince Harry's polar expedition flies Dover school flag

Many scientists predict -- shockingly -- that the entire North Polar ice cap may be completely gone during summer months during the first term of the next president.

CNN: Transcript: Al Gore's speech at Invesco Field