drift off
phrasal verbwithdriftverb[Iusually+ adv/prep]uk/drɪft/us/drɪft/
C2
tograduallystarttosleep:
渐渐入睡I couldn'thelpdriftingoff in themiddleof thatlecture- it was soboring!我在听讲座的过程中不知不觉地睡着了——这个讲座太乏味了!
Animal physiology: sleep & sleeping
- be in the land of nodidiom
 - beauty
 - bed
 - bunk
 - bunk down
 - bye-byes
 - count
 - dead
 - delayed sleep phase pattern
 - drop
 - power nap
 - sleep
 - slumber
 - snooze
 - somnolence
 - soporifically
 - spark out
 - sparko
 - take to your bedidiom
 - yourbeauty sleepidiom