在形容一个人很高兴，很得意的时候，中文经常说这个人走路轻飘飘，好像腾云驾雾一样。英文里也有类似的说法，就是to walk on air。
Susan has been walking on air ever since she got the official letter that she's been accepted as a graduate student at the University of California.
苏珊收到加州大学正式通知书录取她为研究生以后，她就一直很得意洋洋的。