数学证明的美在于它的简洁性和必然性。
The beauty of a mathematical proof lies in its simplicity and inevitability.
过去是一个异国他乡；他们做事的方式不同。
In university they don't tell you that the greater part of the law is learning to tolerate fools.
When you live for others' opinions, you are dead.
Good research is like a good story—it has a beginning, a middle, and an end, and it holds together logically.