他在演讲中说错了日期，真是个低级错误。
He made a ___gaffe by getting the date wrong during his speech.
他在面试中犯了几次明显的错误。
He made several obvious ___gaffes during the interview.
他在会议上问老板薪水的问题，真是个不得体的失言。
Asking the boss about his salary during the meeting was a serious ___gaffe.
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