我不数做了多少仰卧起坐，只在感到疼痛时才开始计数。

A man is like a fraction whose numerator is what he is and whose denominator is what he thinks of himself. The larger the denominator, the smaller the fraction.

In mathematics, you don't understand things. You just get used to them.

数据的力量在于它能够讲述数字本身无法传达的故事。