In a market where there appears to be a surplus, the common mistake is to tack on too many unnecessary requirements.

在一个似乎存在过剩的市场，附加太多不必要的要求是常见的错误。

youdao

A very common mistake, especially early on, is to assume that your reader is the person who will be marking the report.

一个很常见的错误，尤其是在开始阶段，就是想当然地认为你的读者就是给报告打分的人。

youdao

It's a common mistake among learners of English.

这是学英语的人常犯的错误。

《牛津词典》

So that would, this is actually a very common mistake and it makes sense if you think about it.

这的确是一个非常普遍的错误,如果你想想，这个是言之有理的。

哈佛公开课 - 计算机科学课程节选

I think that's probably like the most common mistake for Koreans.

对韩国人来讲这是个普遍的易错的问题。

韩国人经常犯的失误 - SpeakingMax英语口语达人

It's a common mistake to make if you forget that I've actually declared that variable up top, but wait a minute, I know any time that I use a variable, I have to declare it.

这是一个通常犯的错误，如果你忘了,之前在前面已经声明了这个变量，等等，我知道在任何时候,我使用一个变量，我必须声明它。

哈佛公开课 - 计算机科学课程节选

The server's administrator had made a common mistake for which there was a common fix.

FORBES: The Lawyer Hackers Call

Unfortunately, hiring primarily for domain expertise is a common mistake I see CEOs and boards make.

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The most common mistake that Western companies make is that they transport their business exactly as-is to China.

FORBES: Can Groupon Succeed in China?