臣民的政治自由是每个人对自己安全感的平静心态。

最崇高的行为是将他人置于自己之前。

If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.

Sustainable development requires not only vision but also concrete actions.

你必须愿意失败，愿意犯错，愿意带着学到的教训重新开始。