每一次挫折都是卷土重来的铺垫。
Every setback is a setup for a comeback.
Have a heart that never hardens, and a temper that never tires, and a touch that never hurts.
效率和道德必须齐头并进。今天的偷工减料明天将让我们付出沉重代价。
Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.