It's a bad habit to get into, because when you come back to it, it may haunt you later on down the road. So really get into that notion of trying to be defensive as you program.

来运行程序的时候,错误就会出现缠住你了,因此现在我们真的要培养,在程序中有防卫性设计的概念。

麻省理工公开课 - 计算机科学及编程导论课程节选

And so do these three things, if you don't get an "A" then you can come back and talk to me about it later.

并且如果你做到了这三点,而没有得A的话,你可以在出成绩以后过来找我

耶鲁公开课 - 生物医学工程探索课程节选