She wondered for a fleeting moment if he would put his arm around her.他会不会抱住自己, 这个念头在她脑子里一闪而过。

The old caveat was that pleasures were fleeting, but griefs were not.老话说快乐短暂, 悲伤长驻。

The girls caught only a fleeting glimpse of the driver.女孩们只是匆匆瞥见了司机。