Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
对于你所拥有的,要心存感激,这样你就会拥有更多。对于你所没有的,如果不停强调,你永远都不会满足。
"What good's an opinion if you don't know?"
How many times must a man look up Before he can see the sky?
在科学中最令人兴奋的短语,预示着新发现的,不是“我发现了!”,而是“这有点奇怪……”