slip of the pen
似乎是笔记、书法或其他手写文字错误的纯粹技术错误
书面·指书写时的无意错误
英文释义
an unintentional mistake or error made while writing
例句
I wrote 'their' instead of 'there'—just a slip of the pen.
典故来源
源自书写错误，slip指无意中的失误，pen代表书写工具，强调笔误而非口误。