The greatest problem for mathematicians now is probably the Riemann Hypothesis.
I'm not perfect, and I don't pretend to be.
成功的关键是坚持和永不放弃。
最好的建筑来自于构成建筑的所有元素的综合。
Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful. But most people will die tomorrow night, so don't give up today.