我是核心。我是宇宙的中心。

A mathematician's work is never done; there are always more problems to solve.

One is the happiest thing is that somebody loves you.When you are at my time， I absent-minded，When I come to you， when you have gone.We are always in a meeting to miss， losing a lot of.However， I want to say this is because we are still young.No， perhaps this is our life.From then on， I always looked back the road.

好的插画不只是伴随文字 - 它与文字对话。

I'm rich enough to be able to afford to be honest.

传记是在个体中发现普遍性的艺术。

暴风雨过后，天空更晴朗。

The historian must be a poet and a philosopher.