They are so busy and having such fun under the earth or in the trees or heather.

它们很忙，在地下、树上或石楠花丛里玩得很开心。

youdao

"But we're having such fun, aren't we?" he protested with a teasing smile.

“可是我们现在玩得正开心，不是吗？”他带着戏谑的微笑申辩着。

《柯林斯英汉双解大词典》

I've been having such fun!

我玩得很开心！

youdao

In the arts generally people who teach you the arts are going to shudder if you would say oh I interesting in this because it's such fun, because it tells you what life is like or tells you a story and then you'll repeat the story.

艺术一般来说,如果你对教你们艺术的人,说，哦，我对这个很感兴趣,因为它很有趣，因为它告诉你生活是什么,或说它告诉了你一个很好的故事，他会很震惊。

麻省理工公开课 - 电影哲学课程节选

Dreams" is such a fun topic that I'm going to devote half a class to sleeping and dreams.

梦“是个很有意思的话题,我将会用半节课的时间来说说睡眠和梦。

耶鲁公开课 - 心理学导论课程节选

It is not quite as satisfying, nor is it such fun.

ECONOMIST: A new book on love and the law in Japan

America has no such fun with its neighbours.

ECONOMIST: Reg Smythe, creator of Andy Capp, died on June 13th, aged 80

But the conservationists warn that, unless they act now, they will soon have to choose between killing off the manatee population completely or restricting boats so severely that messing about on the rivers, canals and bays of South Florida will no longer be such fun.

BBC: Manatee