数学不是关于数字、方程、计算或算法的：它是关于理解的。

If you want to see what this nation is all about, you have to ride the rails. Look outside as you speed through, and you’ll find the true face of America.

世界不是一个愿望实现的工厂。

Sustainable development requires not only vision but also concrete actions.

我们是生存机器——盲目编程的机器人车辆，以保存被称为基因的自私分子。