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1·I thought I'd drop in on you while I was passing.

我曾想路过时顺便来看看你。《牛津词典》

2·After that, feeling the need to explore further, I decided to drop in on one of ASL club's meetings.

在那之后，觉得有必要进一步探索，我决定去参加美国手语俱乐部的会议。

3·I'll drop in on you when I have time.

有空我来看你。《新英汉大辞典》

4·Shall we drop in on John?

我们乘便造访一下约翰吗？

5·Please drop in on Mary one evening.

抽个晚上去看看玛丽。

6·I'll drop in on you on my way home.

我回家时，顺路去看看你们。

7·Drop in on us when you come to town.

你早晚上城里来，到我们这里坐坐。

8·Oh, I just drop in on him for a chat.

哦，我只是顺便来和他聊聊天。

9·Oh! I just drop in on him for a chat.

哦，我只是顺便来和他聊聊天。

10·Maybe just came by and drop in on us.

也许就是路过顺便来看看。