公开演讲时，要经常停顿。在你用新方式阐释某件事情前停顿，在你讲述重要的事情之后停顿，以及，刻意制造停顿，让听众吸收细节。
When public speaking， pause frequently. Pause before you say something in a new way， pause after you have said something you believe is important， and pause as a relief to let listeners absorb details.
The essence of mathematics lies in its power to reveal patterns and symmetries.
完全为了对不全的爱，把自己装饰得美丽。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
没有事实，只有解释。
The past is never dead. It's not even past.
The countries that have benefited least from fossil fuels should not bear the heaviest burden of climate change.
激发生命，让生命自由发展，这是教育者的首要任务。