可以用 "exhausted but happy" 来表示 "累而且开心" 的意思。
"Exhausted" 是形容词，意思是 "筋疲力尽的，疲惫不堪的"。它来源于拉丁语 "exhaustus"，意思是 "枯竭，用尽"。
"Happy" 是形容词，意思是 "快乐的，愉快的"。它来源于中古英语 "hap"，意思是 "幸福"。
例句：
I was exhausted but happy after completing the marathon. (我在完成马拉松之后感到累而且开心。)
The party went on late into the night, and we were all exhausted but happy when it was finally over. (聚会持续到深夜，当它最终结束时，我们都感到累而且开心。)
"Exhausted" 是形容词，意思是 "筋疲力尽的，疲惫不堪的"。它来源于拉丁语 "exhaustus"，意思是 "枯竭，用尽"。
"Happy" 是形容词，意思是 "快乐的，愉快的"。它来源于中古英语 "hap"，意思是 "幸福"。
例句：
I was exhausted but happy after completing the marathon. (我在完成马拉松之后感到累而且开心。)
The party went on late into the night, and we were all exhausted but happy when it was finally over. (聚会持续到深夜，当它最终结束时，我们都感到累而且开心。)