历史学家行走在事实与想象的钢丝上。
The historian walks a tightrope between fact and imagination.
The thing that is important is the thing that not seen… It is just as it is with the flower。 If you love a flower that lives on a star， it is sweet to look at the sky at night。 All the stars are abloom with flowers…
It is easier to change the specification to fit the program than vice versa.
企业的发展离不开团队的力量，一个人的能力再强也有限。
数学是人类精神最美丽和最强大的创造。