A: would you mail a letter for me? My hands are full.
B: oh, I’m sorry, I’m afraid I can’t do it now. I have to meet my supervisor in a few seconds. But I could mail it after that.
A: That’s fine. We’re going to drop in and see Jimmy tonight. Don’t forget it.
B: I won’t.
A: Thanks. see you.
B: Don’t mention it. see you.
drop in 顺便拜访;顺道来访
I just drop in on him for a chat.
please drop in when you are free.
my hands are full 我手头很忙
I’d like to go with you. But my hands are full.
Don’t mention it 别提了,不客气
I sorry to have troubled you, --Don’t mention it
I apologize for what I’ve done. —Don’t mention it.