出自汉·桓宽《盐铁论·后刑》。锄去田里有害的杂草，禾苗就可以健康地生长；惩罚为非作歹的恶人，百姓就会感到喜悦。

The study of attention provides a window into how the brain selects, integrates, and acts upon information.

I always try to be better than I was yesterday.

乳制品生产成功的关键在于平衡效率与动物福利。

我不是政治家，我不是传教士，我只是个说唱歌手。