Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.
No man really knows about other human beings. The best he can do is to suppose that they are like himself.
Efficiency in forestry doesn't mean cutting more—it means making every tree count.
商场如战场,防人之心不可无。  
深度学习是一个强大的工具,但它不是万能的。