我们必须通过文学来理解我们的历史。
In mathematics, you don't understand things. You just get used to them.
如果你尊重纸的特性并相应设计,纸也可以是永久的。
The greatest misfortune is not knowing what's enough.
不要为成功而努力,要为做一个有价值的人而努力。