I didn't do all that work just for the fun of it.

我做这一切并不仅仅是为了好玩。

《牛津词典》

youdao

youdao

Some chasers do it just because it is their idea of fun.

VOA: special.2010.05.11

It's important to keep in mind always that what we do can be fun And never lose that sense of fun and enjoy exploring things I think being an engineer is partly just problem-solving and mind-set.

有一点非常重要,就是始终牢记我们所做的事情是令人愉快的,不要丧失了这种愉悦感,要享受探索的乐趣,我认为成为一名工程师从某种程度上来说,就意味着解决问题，提出创意。

普林斯顿公开课 - 领导能力简介课程节选

We do a lot of unique things here and have a lot of opportunities to do fun things in classes.

我们的活动都很独特，课上有很多机会做一些有趣的事。

又有趣又奇特的课堂 - SpeakingMax英语口语达人

But a lot of the things that I have to do are a lot of fun.

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This sounds strange, but given what I know of the jailbreaking community, there are researchers who do it purely for the fun of doing it.

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There is plenty to do for an afternoon of fun.

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