自由并不意味着摆脱某物，而是能够自由地去做某事。

数学的进步是通过不断质疑已建立的真理来实现的。

The past is always constructed from the present.

Attosecond science allows us to capture the fastest motions in the microcosm, like freezing the wingbeat of a hummingbird.

The best management is a true science, resting upon clearly defined laws, rules, and principles as a foundation.

对付敌人的最好武器就是另一个敌人。