I came here for work, not for fun.

我来这里是来工作的，不是来玩的。

youdao

We were only allowed to do entertainment programming, but... the mood here was not for fun shows.

我们仅被允许做娱乐节目，但……此地却缺少娱乐节目的氛围。

youdao

In fact, those thousands of hours of forced work at math, done for a grade and not for fun or for any practical use, are what make math seem so difficult and intimidating.

事实上，那些在数学上的强迫的数千小时的学习，为的是成绩而不是乐趣，没有任何实际用途，正是这一点，使数学显得如此艰难和恐怖。

youdao

But another engineering student from India,Bikramjeet Singh Grewal, says he does not have time for much fun in the sun.

VOA: special.2010.05.27

And for me it's fun because I may not know the novel that you end up picking, and so it is a kind of challenge for me to take a novel that you've chosen and come to grips with it myself It may be one that I know.

我也觉得很好玩,因为我可能不知道你们最后选择的小说，所以对我来说,认真对待你们选的一本书很有挑战性,可能是一本我知道的书。

耶鲁公开课 - 1945年后的美国小说课程节选

I mean parties are fun, but there's not too much time to party, not too much time for study.

我是说派对很有意思，但是我们没有很多时间去玩，也没有很多时间去学习。

派对很好玩 - SpeakingMax英语口语达人

As I set off on my next expedition and find myself in harsh climates again, while cycling 15, 000 miles from Alaska to Chile and climbing some of the highest mountains, I will keep in mind the Mountain Rescue teams - who work in these environments, not for fun, but to save lives.

BBC: Rescuers tackle urban landscape

It's not just for fun and frivolty.

FORBES: Magazine Article

Explaining this to her was not fun for me, and I imagine it was even less fun for her.

FORBES: Asking For a Raise? 3 Questions to Ask Yourself First