那些许诺我们人间天堂的人除了地狱什么都没有搞出来。
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."
If you’re not willing to be unpopular for being right, then you don’t deserve to be right.
好的设计是隐形的;只有当它不好时你才会注意到。