每个人都是自己最大的敌人，仿佛是自己的凶手。
人依靠自己的力量人才能生存,不依靠自己的力量人就不能生存。
To signal an emergency， use the rule of three； 3 shouts， 3 horn blasts， or 3 whistles.
I am not a hero of mathematics. I'm not even that successful; that is why I don't want to have everybody looking at me.
Insight is the sudden comprehension of the relations among the parts of a problem.