in seventh heaven来自犹太人或者穆斯林的信仰，认为七重天是至高无上的极乐世界，用来描绘处于尽善尽美的境地。即十分高兴；高兴极了；欢天喜地。

【例句】
The children are in the seventh heaven with their new toys.
孩子们因有了新玩具而欢天喜地。

It was wonderful being on vacation for a whole month. I was in seventh heaven.
整整一个月的假期，真是太好了。我简直欣喜若狂！