The writer must be a defender of freedom, even at the cost of his own comfort.

The man who does not read has no advantage over the man who cannot read.

成功不是幸福的关键。幸福才是成功的关键。

The study of automorphic forms is a reflection of the beauty of mathematical symmetry.

能量守恒定律不仅仅是一个抽象原则；它是已被无数实验验证的自然法则。