讲解文本：
on cloud nine 高兴得飘飘然，极其快乐，高兴到九霄云外 Jenny was on cloud nine for days after Mike asked her to the prom. 迈克邀请詹妮参加学校舞会，她兴奋了好几天。 When Lucy was born I was on cloud nine. Lucy出生的时候，我都乐得找不着北了。
疯狂练习吧！
