为明天做的最好准备就是今天做到最好。
I believe in the power of education to change the world.
地理学的研究是对地球作为人类居住地的研究。
唯一真正的错误是我们从中什么也没学到的错误。
The bigger the crowd, the more unnatural the picture.
Every mathematical problem is a window into a new world of understanding.