Gently increases power over the first 12 USES, to ease into the Sonicare experience.
轻轻地提高了功率比前12个使用，以缓解入Sonicare的经验。
2
In this six-week study, the efficacy of a sonic toothbrush (Sonicare) was compared with traditional manual brushing in a setting where hygiene care was provided by caregivers.