fleetingly什么意思？

fleetingly的音标：fleetingly的英式发音音标为：['fli:tɪŋlɪ]fleetingly的美式发音音标为：['flitɪŋlɪ]...

I think I saw her, fleetingly, at a football match.我想我在一场足球赛上匆匆见过她一次。A smile passed fleetingly across his face.他脸上闪过一丝笑容。The quarks and gluons indeed break out of confinement and behave collectively, if only fleetingly.夸...