be on top of the world
⇒ 喜讯传来,全家兴高采烈。
When the good news arrived, the family was on top of the world.
英语词典包含298861条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。