通过在显微镜下观察这些毛囊，他们看到了何时干细胞变异为其他细胞以及这些变异如何与毛发变白联系在一起。
By looking at the hair follicles under microscopes, they saw when the stem cells turned into other cell types and linked the change to the graying hair.
西村之前就已发现了毛囊中的干细胞，并显示出衰老时干细胞的消耗导致了毛发变白。
Nishimura had previously discovered the stem cells within hair follicles and showed that their depletion during aging causes hair to turn gray.
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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