每一个数学问题都是一个等待解决的谜题,每一个解决方案都是迈向更深入理解的一步。
Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.
Don‘t keep making the same mistakes; try to make new mistakes.
合同本质上是不完全的,因为不可能预见所有未来的偶然事件。