圆的周长大于任何内接等边多边形的周长，小于任何外切多边形的周长。
La poesía es el arte de la sugerencia, no de la afirmación.
No man knows, or ever will know, the truth about the gods and about everything I speak of; for even if one chanced to say the complete truth, yet one knows it not; but seeming is wrought over all things.
In the end, we will remember not the words of our enemies, but the silence of our friends.
当地社区必须是水产养殖的利益相关者，而不仅仅是旁观者。
Real suffering does not come from outside, but from how we understand it.
如果我们认为可以将主动数据库系统中过程与数据的比率任意减小，甚至保持较小，那我们就是在开玩笑。