If you start out by promising what you don't even have yet, you'll lose your desire to work toward getting it.
解析:看到正义的事,却不能勇敢去做,这是懦夫的表现。
解释:所谓美的东西,无论在上下、内外还是远近,都不会产生危害,所以才叫做美。
数学不是一项观赏性运动;要理解它,必须积极参与其中。
The best way to think about a program is to think about it.