on air
正在广播, 正在播出
例句与用法：
After hearing the good news, Charles walked on air.
听到这个好消息，查尔斯喜气洋洋。
After he heard the news he trod on air.
听了这一消息后，他得意洋洋。
Malcolm has been walking on air since he was offered that job he has been trying so hard for.
自马尔科姆得到那份他一直非常想得到工作后，他一直洋洋得意。
He waltzed me round so delicately I felt as if I was floating on air.
他非常轻快地带着我跳华尔兹舞，我感到好像在空中飘荡着。