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。

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