北极熊惊人的体积、力量以及在严寒极地生存的能力令人敬畏不已。

Polar bears inspire awe with their incredible size, power and ability to survive in the frigid Arctic.

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除了极地，基本上所有的生物都生存在由人类“定义”的岛屿上——其中最大的，自然就是地球了。

Outside the polar regions, almost all nature now exists in human-defined islands — and the biggest island of all, of course, is Earth.

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他们正在考虑如何在极地冬季生存。

They are thinking about how to survive in a polar winter.

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