你替我发封信好吗？我现在很忙。

　　B: Oh, I am soryy. I’m afraid I can’t do it now. I have to meet my supervisor in a few senconds. But I could mail it after that.

　　哦，对不起，现在恐怕不行，过一会儿我必须见我的导师，但是过后，我可以替你发。

　　A: That’s fine. We’er going to drop in and see Jimmy tinight. Don’t forget it.

　　那也行，今天我们顺便去拜访一下Jimmy，别忘了。

　　B: I won’t.

　　忘不了。

　　A: Thanks. See you.

　　谢谢！回见。

　　B: Don’t mention it. See you.

　　别客气，回头见。

　　drop in

　　1. 解词释义

　　Drop in 是指“顺便拜访”“顺道拜访”“突然拜访”。

　　2. 拓展范例

　　e.g. She spent most of the day dropping in on friends in Edinburgh.

　　她一天的大部分时间都用来拜访在爱丁堡的朋友了。

　　e.g. Oh! I just drop in on him for a chat.

　　哦，我只是顺便来和他聊聊天。

　　e.g. Please drop in to tea.

　　请随便来我家喝茶。

　　e.g. They would just drop in on us for a chat at any moment.

　　他们随时都会来我们这儿聊天。

　　mail a letter：发一封邮件

　　e.g. How much does it cost to mail a registered letter to China?

　　寄往中国的挂号信要多少钱？

　　e.g. They asked her to mail him a letter.

　　他们要她给他寄封信。

　　e.g. He went to the post office to mail a letter.

　　他到邮局寄信去了

　　1. 我现在很忙。

　　翻译：My hands are full.

　　2. 不客气。

　　翻译：Don’t mention it.