The only way to learn mathematics is to do mathematics.
学习数学的唯一方法就是做数学。
让男孩们表现良好的最好方法是让他们对有价值的事情保持兴趣。
仓库里没有积蓄备用的粮食,一旦遇到饥荒之年,就很难应付了。
The only way to learn a new programming language is by writing programs in it.
The true measure of success is leaving the land better than we found it.