pen error

例句：

1. 1. The writer made a pen error in his article.
   作者在文章中犯了笔误。
2. 2. It's important to catch any pen errors before the final draft is complete.
   在最终稿件完成之前，重要的是要纠正任何笔误。
3. 3. The proofreader caught a few pen errors that needed to be corrected.
   校对员发现了一些需要更正的笔误。