There was a mistake over his booking.

他的预订中有个错误。

《柯林斯英汉双解大词典》

Suppose there was a mistake and user atc was not supposed to be removed.

假设这是错的，不应该删除atc用户。

youdao

I showed the project manager the results I got and told him that there was a mistake in one of the trials.

我给项目经理展示我的结论并且告诉他在进程中我们出现了一个小的失误。

youdao

She said she was afraid there might have been a mistake.

VOA: special.2010.02.09

"There was no consultation and I think they made a grave mistake against the interests of their own people."

VOA: standard.2009.10.05

"They both recognize there was a mistake, " Chelsea manager Rafa Benitez said.

NPR: Chelsea Star Ejected For Kicking At Ball Boy

If there was a mistake in the counting, they'll reinstate her as the winner, but Zaki says she no longer trusts the system.

NPR: Doubts Linger Over Afghan Election

There was a mistake done in the experiment.

NPR: Revisiting the Viking Missions to Mars