笔在笔盒里英文怎么说

"Pen in a pen case" 的英语表达为 "a pen in a pen holder" 或者 "a pen in its holder."

这个表达式是在日常英语中使用的，是一种通俗易懂的说法。

以下是一些例句：

Can you pass me a pen in the pen holder, please?
请把笔盒里的笔给我好吗？

I always keep my favorite pen in its holder on my desk.
我总是把我最喜欢的笔放在桌子上的笔盒里。

Make sure to put the pen back in its holder when you're finished using it.
用完笔后一定要把它放回笔盒里。