不确定性原理不是我们知识的限制，而是自然界的基本属性。

 One foul sentence does more hurt than many foul examples. For these do but corrupt the stream；the other corrupt the fountain.

可持续发展不仅仅是一个流行词，而是我们对后代的责任。

The cowards never started, and the weak died along the way. That leaves us to continue our journey.

做伟大的事情很困难，但指挥伟大的事情更困难。