离散数学和连续数学之间的相互作用是一些最有趣的问题所在。

Don't be afraid of failure, be afraid that you don't even dare to try.

All changes follow a law.

物理定律在宇宙中任何地方都是相同的。

科学家不是给出正确答案的人，而是提出正确问题的人。

We are all alone, born alone, die alone, and—in spite of True Romance magazines—we shall all someday look back on our lives and see that, in spite of our company, we were alone the whole way.