I couldn't help drifting off in the middle of that lecture - it was so boring!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!
drift offADVERB➤gradually, slowly漸漸/慢慢離去PREPOSITION➤into慢慢陷入;漸漸進入◇He drifted off into a deep slumber.他漸漸進入沉睡狀態。PHRASES➤drift off to sleep昏昏入睡◇She closed her eyes and slowly drifted off to sleep.她閉上眼睛,漸漸進入夢鄉。