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》
2
With half an inch of rain per year, the beetle can only survive by consuming the dew it collects on the hydrophilic skinof 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。
3
When conditions are hot, the ostrich erects them on its back, thus increasing the thickness of the barrier between solar radiation and the skin.