保暖：就像北极熊和水獭，人类很有可能长出类似于“鲸脂”的皮层来保暖。

Keeping warm: Just like the polar bear and the otter, it is possible that humans develop an extra layer of "blubber" to keep warm.

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当北极熊抱着爪子睡在冰山上时，它就像一个蹒跚学步的孩子抱着他们的泰迪熊。那真的很可爱！

While a polar bear is sleeping on an ice berg with its paws clutched around, it is like a toddler holding their teddy bear. That is truly cute!

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当北极熊在冰山上睡觉时，爪子抓住周围，就像一个蹒跚学步的婴儿抓着他们的泰迪熊一样，那是真的非常可爱！

While a Polar bear sleeping on an ice berg with its PAWS clutched around it like a toddler holding their teddy bear is truly cute.

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