Feel how soft the skin is in the small of the back.

摸一摸腰背部的皮肤有多么柔软。

《柯林斯英汉双解大词典》

With half an inch of rain per year, the beetle can only survive by consuming the dew it collects on the hydrophilic skin of its back in the early mornings.

在每年只有半英尺降雨量的环境下，这种甲虫只能通过它背部亲水性皮肤在早晨收集的水露存活下来。

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When conditions are hot, the ostrich erects them on its back, thus increasing the thickness of the barrier between solar radiation and the skin.

当天气炎热时，鸵鸟会把它们背在背上，这样就增加了太阳辐射与皮肤之间的屏障厚度。

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You can tell a guy has raced before when you see him whip out a tube of super glue to stick a flap of skin back onto his foot.

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While burn damage is normally patched with pieces of excess skin from a person's own body, this does not work if the whole face needs to be covered -- the skin of the entire back is less than half of what would be needed to cover the full face and scalp, Siemionow said.

CNN: Face transplant patient regains self-confidence

Even the hair on Wiens' head, from the mid-scalp area, is part of the donor skin (the hair on the back of Wiens' head is his own).

CNN: Face transplant patient ready to go home