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.
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