That was only a slip of the pen.

那仅是笔误.

辞典例句

A slip of the pen made me say Robert insteadof Richard.

我的笔误把理查德写成了罗伯特.

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The wrong date on the check was a slip of the pen.

支票上写错的日期是个笔误.

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" Too " was a slip of the pen; I meant to write " to "

“ Too ” 是笔误, 我原想写 “ to ”

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I'm sorry I spelled your name incorrectly; it was a slip of the pen.

我很遗憾将你的名字拼错了, 这是个笔误.

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That was a slip of the pen. I meant to write September, not Movember.

那是笔误, 我的意思是写九月而不是十一月.

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