translation.en: And because these mutations happen approximately as a function of time, you can transform these differences to estimates of time, where the two humans, typically, will share a common ancestor about half a million years ago, and with the chimpanzees, it will be in the order of five million years ago.
translation.zh: 由于这些突变 多少起到了时间的作用 你可以通过这些差异 来对时间进行预测 这两个人类通常 在50万年前有共同的祖先 而与黑猩猩 则在500晚年前有共同的祖先