Don't mention it.
1. 别客气。
make mention of
1. 提及
Did she make any mention of having seen me?
她有没有提及见过我?
not to mention
1. 更不必说
It's far too late for you to go out and play football, not to mention the fact that it's raining.
你现在出去踢足球太晚了, 何况又正在下雨。
习惯用语Don't mention it.1.不要客气, 不用谢2.没关系, 不要紧3.哪 里哪里(作客套语)not to mention (=without mentioning)1.更不必说, 更谈不上(not) worth mentioning1.(不)值得一提at the mention of1.在(听人)提到...时make mention of1.提到..., 说到...