我们生活在一个美丽的世界。

The poor are not lazy; they are just caught in a system that makes it very hard for them to escape poverty.

优秀的数学家应该既严谨又富有想象力。

Don't be afraid of failure, failure is the necessary path to success.

真实永远超出我们的表达。

最重要的是不断突破界限。