形劳而不休则弊,精用而不已则竭。
身体劳累而不休息,就会疲困;精力使用过度而不止歇,就会衰竭。
The best way to predict the future of our forests is to create it.
成功是一系列小胜利的积累。
Mathematics is not a spectator sport. You have to get involved.