1.Many many happy returns! I wish I could be with you to share on this joyful occasion.
祝您寿比南山，福如东海！真盼望我能与您共享这个快乐的场面。
2.They were singing and dancing to celebrate this joyful occasion.
他们唱着、跳着庆祝这令人欢乐的时刻。
3.We are once again gathered here on this joyful occasion to celebrate the New Year.
今天，我们再次在这里欢聚一堂，共迎新年。
4.Let us sing some songs to celebrate this joyful occasion.
让我们唱歌来庆祝这令人欢乐的节日吧。
5.His good mood fitted in with the joyful occasion.
他的好心情很适合这个快乐的场合。
6.His good mood fits in with the joyful occasion.
他良好的心绪与那欢快的场合很和谐
7.His good mood fit in with the joyful occasion.
他的好情绪颇与这欢乐的场合调和。
8.It's a most joyful occasion.
那是最快乐的时刻。