fast asleep片語KK [fæst əˋslip] /fæst əˈslip/發音片語1熟睡、睡得很沉、睡熟The baby was fast asleep in her stroller by the time we got home.我們回到家時,寶寶已經在推車裡睡得很熟了。2睡著、入睡多與 fall 連用He fell fast asleep the moment his head touched the pillow.他頭一碰到枕頭就睡著了。