L-函数的研究证明了抽象在数学中的力量。

The structure of the international system forces states to behave in certain ways, regardless of their internal characteristics.

要有继续追逐梦想的勇气。

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

秩序：物归其位，事有定期。