你必须先对自己有所期望,然后才能做到。
You have to expect things of yourself before you can do them.
数学家的模式,就像画家或诗人的模式一样,必须是美丽的;思想,就像颜色或文字一样,必须以和谐的方式结合在一起。
In times of crisis, the true character of a company is revealed.