This finding suggests that increases in tolerance are permanent; a relapsing smoker will never get as much suppression of craving from a single cigarette as a novice smoker will.

• 这项发现暗示著，耐受性的增加是永久的；持续抽菸者永远无法像新手一样，一根香菸就可以压抑住那麽多的渴望。