Don't make such a careless mistake.

不要犯这样粗心的错误。

youdao

Don't make such a careless mistake again.

不要再犯这种粗心的错误了。

youdao

How could you make such a careless mistake?

你怎么能犯这么粗心的错误？

youdao

But the local authorities quickly revealed that the bomb was simply a careless mistake.

BBC: The festive gunfire of Benghazi

We made this clear to the executive producers of the series who apologized immediately for this inadvertent careless mistake.

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