由于船要在极地地区航行，那么也需要动力装置以满足穿越冰海的需求。
As this boat will navigate the Polar Regions, it was necessary to have motors to travel through the sea ice.
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。
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.
随着更多的冰融化，更大的深色无冰海面被露出。它们会吸收更多的热量，从而加剧冰的融化。
As more ice melts, more dark open water is exposed, which absorbs more heat, accelerating the melting.
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