时间是一位伟大的老师，但不幸的是它杀死了所有的学生。
Time is a great teacher, but unfortunately it kills all its pupils.
The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum.
Sustainable energy solutions will define the 21st century.
对于好建议，唯一能做的就是传递它。它对自己从来没用。
What I’ve achieved in tennis is great, but who I am as a person is more important.