皮肤下的毛囊控制它的生长，所以割掉死亡的毛发，是不会有任何影响的。
The hair follicles underneath the skin control it, so cutting away dead hair, isn’t going to do anything.
自然选择褪去了厚厚的毛发，但是却把背后的控制机制留了下来。
Natural selection removed the thick hair but left behind the mechanism for controlling it.
皮肤下的毛囊控制它的生长，所以割掉死亡的毛发，是不会有任何影响的。
The hair follicles underneath the skin control it, so cutting away dead hair, isn't going to do anything.
BMP12是一组控制哺乳动物毛发和鸟类羽毛密度的蛋白质，它的主要作用是减缓羽毛的生长。
BMP12 is one of a group of proteins that control the density of hair in mammals and feathers in birds. In the case of BMP12, it slows down the growth of such features.
BMP12是一组控制哺乳动物毛发和鸟类羽毛密度的蛋白质，它的主要作用是减缓羽毛的生长。
BMP12 is one of a group of proteins that control the density of hair in mammals and feathers in birds. In the case of BMP12, it slows down the growth of such features.
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