危机感要时刻保持。

不可以同井底的青蛙谈论大海的辽阔，因为有空间的拘束；不可以同夏天的小虫谈论冰冻的寒冷，因为有时节的局限。

The food issue is not only an economic issue, but also a political one, related to the long-term stability of the country.

Mathematics is the most beautiful and most powerful creation of the human spirit.

要理解一个生命，必须先理解它所处的时代。

我们必须拥抱未知，才能发现自己的真正潜力。