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Polar bears cannot survive without sea ice, using it to raise their young, to travel and as a platform for hunting seals - their primary food source.

没有海冰，北极熊就无法生存。 它们需要利用海冰来抚养幼仔，四处漫游，并以此为平台捕猎它们的主要食物，海豹。

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Polar bears are threatened because they use sea ice as a platform from which to hunt seals. But a warming climate brings many problems for the Inuit.

气候变暖让北极熊受到威胁是因为他们需要冰海来捕捉海豹，但是一个暖和的气候对因纽特人会带来很多麻烦。

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From a platform of sea-ice, a team of researchers from Germany, Italy, New Zealand and the United States has been drilling down into the sea floor beneath the McMurdo Sound.

ECONOMIST: The South Pole as location and metaphor

The 1999 mission is being conducted aboard the USS Hawkbill, a nuclear submarine that is able to travel almost at will under the ice, making it a unique platform to study this little explored region.

CNN: Nuclear sub dives under the ice to explore climate change

Launches on Android platform 2.3 (Gingerbread), upgrade to Android platform 4.0 (Ice Cream Sandwich) during the second quarter of 2012.

ENGADGET: Sony officially debuts Xperia U at MWC 2012 Mobile