这是学英语的人常犯的错误。

It's a common mistake among learners of English.

《牛津词典》

新任经理经常犯的错误是什么？

What are the common mistakes of new managers?

youdao

无聊乏味。这可能是最常犯的错误。

Being Boring. This is probably the easiest mistake to make.

youdao

This is only true for an ideal gas. Since it's true for an ideal gas, then we can go ahead and replace this with Cv, and then we have Cp=Cv+R Cp with Cv plus R, which is what we were after.

常犯的一个错误，这只对理想气体成立,因为对理想气体成立,所以我们可以继续，用Cv代替,这项，最后得到。

麻省理工公开课 - 热力学与动力学课程节选