累并快乐着英文可以翻译为"being tired and happy at the same time". 这个词组来源于中文，意思是在经历疲惫和辛苦的同时，仍然保持快乐和愉悦的心情。

一些英文例句及其中文翻译如下：

After a long day of hiking, I'm feeling tired and happy at the same time.

经过一整天的徒步旅行后，我感到累并快乐着。

I may be exhausted from all the work, but I'm also proud of what I've accomplished.

我可能因为工作疲惫不堪，但我也为自己所取得的成就感到自豪。

The marathon was tough, but crossing the finish line was a feeling of being tired and happy at the same time.

马拉松赛跑很艰难，但是跨过终点线时，我感到累并快乐着。