The best edits are the ones you don't notice.

人们对自己的遗传学了解得越多，就越能掌控自己的健康。

It is not the benevolence of the employer that determines the wages of labor， but the competition among employers.

Civilization is a stream with banks. The stream is sometimes filled with blood from people killing, stealing, shouting and doing the things historians usually record, while on the banks, unnoticed, people build homes, make love, raise children, sing songs, write poetry and even whittle statues. The story of civilization is the story of what happened on the banks.