on top of the world
非常高兴或满足的状态
口语·表达极度快乐
英文释义
extremely happy or successful
例句
After winning the lottery, she felt on top of the world.
典故来源
源自20世纪英语，top of the world指世界之巅，比喻极度的快乐或成功感，如登顶般满足。