孔子说：“君子有三件事要警戒：年轻时，血气还不成熟，要戒女色；年壮时，血气正旺盛，要戒争斗；年老时，血气已衰落，要戒贪婪。”

Children are not just miniature adults; they have their own way of seeing and understanding the world.

If you're lonely when you're alone，you're in bad pany。

The only fence against the world is a thorough knowledge of it.

人生苦短，必须快乐。

人工智能的关键一直是表示法。