学习数学的最好方法就是做数学。

Quality should never be compromised, even in the face of challenges.

An invention can be so valuable as to be worthless to the inventor.

We are at a unique stage in our history. Never before have we had such an awareness of what we are doing to the planet, and never before have we had the power to do something about it.

【释义】就算搭建起绵延千里的盛大长棚，也没有永远不散场的宴席；人与人之间的相伴没有永恒，没有人能一辈子守护另一个人。