代表喜庆和团圆的英语表达可以是 "celebration" 和 "reunion"。
"Celebration" 来自拉丁语 "celebratio"，意思是庆祝、欢庆。例如：
We had a big celebration for my birthday. (我们为我的生日举办了一场盛大的庆祝活动。)
The team's victory was a cause for celebration. (球队的胜利是值得庆祝的事情。)
"Reunion" 来自拉丁语 "re-unio"，意思是重聚、团聚。例如：
I'm looking forward to our reunion at the family gathering. (我期待着家庭聚会上的团聚。)
After so many years apart, it was a joyful reunion when we finally saw each other again. (多年分离后，我们再次见面是一次欢乐的团聚。)
希望这些信息能帮到你！