Weird things, bad things can happen and so one of the lessons too that will be repeated throughout the course is to actually rigorously error check and make sure that you're always thinking about your user being a bad guy.

各种古怪的事情就会蜂拥而至,所以在这个课程中我反复强调,要一丝不苟地检查错误,你就当你的用户是个调皮捣蛋的家伙。

哈佛公开课 - 计算机科学课程节选

It seems to me that if you type this you'll get a spell check error.

我拼写不是很好,要是有拼写检查就好了

耶鲁公开课 - 金融市场课程节选

It finds one syntax error at a time, so you have to be a little patient to do it, but you can check that the syntax is right.

它一次会找到一个语法错误，所以你们必须要有点耐心，但是你们可以检查出语法是否正确。

麻省理工公开课 - 计算机科学及编程导论课程节选