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 most dangerous illusions are those we mistake for reality.
The best way to make your dreams come true is to wake up and work.
You have to really believe not only in yourself but in what you're doing.
亲代投资是理解两性交配策略差异的关键。
自守表示的研究揭示了数域的隐藏对称性。
The state is not a work of art; it is a necessity.