drift off
phrasal verbdrift off (to sleep)
- to fall asleep
入睡；睡着 - I didn't hear the storm. I must have drifted off by then.
我没有听见暴风雨，那时一定是睡着了。 - She closed her eyes and slowly drifted off to sleep.
她闭上眼睛，渐渐进入梦乡。
- I didn't hear the storm. I must have drifted off by then.