老师问：“为什么你觉得你很愚蠢呢，小约翰？”

The teacher said, "Why do you think you're stupid, Little Johnny?"

youdao

我知道我当时很愚蠢；你不必老提这件事。

I know I was stupid; you don't have to rub it in.

《牛津词典》

如果你想在晚上出门，这也是你的选择，但影响到白天的课堂表现会是很愚蠢的。

It's also your choice if you want to go out at night, but you will be foolish to let that affect class performance during the day.

youdao

And will make mistakes. And therefore, you write your programs so that catastrophes don't occur when those mistakes are made.

就是人是很愚蠢的，会犯错误的，因此，你要这样设计你的程序,以达到当犯错误时避免大事故的目的。

麻省理工公开课 - 计算机科学及编程导论课程节选

These are stupid questions, because once you understand what they're asking, the answer is just built in. It follows trivially.

这是些很愚蠢的问题,因为一旦你明白了他们的问题,答案就在其中,一切简单明了

耶鲁公开课 - 死亡课程节选

And then there are some stupid syntax like curly braces and semicolons that initially are kind of annoying because you have to remember where all this junk goes.

还有一些像大括号和,分号之类的愚蠢语法,最初是很讨厌的,因为你需要记得它得放到哪里。

哈佛公开课 - 计算机科学课程节选