最大的回报不是经济收益，而是能够以积极的方式影响人们的生活。

我不让未来限制我，我让它激励我。

自由的土地上，人人都是国王。

跳著舞的流水啊！当你途中的泥沙为你的歌声和流动哀求时，你可愿意担起他们跛足的重担？

The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome of the historical process.

I have been a selfish being all my life, in practice, though not in principle.

量子算法以经典算法无法做到的方式揭示了量子力学的力量。

PID控制器是控制工程师的通用工具，适用于各种各样的过程。

There's a tendency to think that our present politicians are much worse than we had in the past.But we tend to forget how awful our politicians were in the past.