学习数学的唯一方法就是做数学。

Everyone has a secret world inside of them. All of the people of the world, I mean. Everybody. No matter how dull and boring they are on the outside, inside them they’ve all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them. Thousands maybe.

我觉得布什总统根本没有为艾滋病做任何事。事实上，我都不能确定他会不会拼艾滋这个单词。