I always cheer up immensely if an attack is particularly wounding because I think, well, if they attack one personally, it means they have not a single political argument left.

数学不仅仅是一种工具；它是一种思维方式。

虽然在一切的成长物中，爱情看上去是最快的，究其实却最迟缓。男男女女没有一个人晓得什么是十全十美的爱，除非一直到他们结婚了二十五年之后。