他说他在与一位摇滚乐歌星谈恋爱，我还以为他在开玩笑呢。

I thought he was kidding when he said he was going out with a rock star.

《牛津词典》

他是跟你开玩笑呢。你别当真。

He is joking. Don't take it seriously.

《新英汉大辞典》

他还以为我在同他开玩笑呢！

He genuinely thought that I was still kidding around with him.

youdao

Alright, so bubble of sorts of course is being poked fun at there for what reasons?

冒泡排序在这儿显然是被拿来开玩笑了,那么原因是什么呢？

哈佛公开课 - 计算机科学课程节选