1、 StepRemove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush.
步骤每天早上用电动牙刷清除口腔中的300种细菌。
来源:衡水等百强名校题库
2、 The toothbrush gently removes plaque without damaging the gums or causing bleeding.
牙刷轻轻地刷去齿菌斑,没有伤及牙床或引起出血。
来源:秒词邦搜集整理