每个数学问题都有一个解决方案；只是需要时间和努力去找到它。

I look back on the past, committed a felony little fool, I want to communicate with him and let him understand, but I can't do this, the boy would not see the, only my old trunk.

Three passions， simple but overwhelmingly strong， have governed my life: the longing for love， the search for knowledge， and unbearable pity for the suffering of mankind.

History is, above all else, the creation and recording of that heritage; progress is its increasing abundance, preservation, transmission, and use.