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很多人担心衰老,但很少有人意识到,不管你的寿命多长,你身体的某些部分其实只有几周甚至几天的寿命.这是因为它们在不断进行自我更新。
Many people are worried about aging, but few realize that some parts of your body may last only weeks or days, no matter how long they live, because they are constantly self-renewing.