牙垢

例句：

1. 1. The dentist advised me to brush myteeth twice a day to remove the dentalplaque and prevent tooth decay.
   牙医建议我每天刷牙两次，以去除牙菌斑并预防蛀牙。
2. 2. After cleaningmy teeth, I noticed that there wassome buildup of dental plaque on myteeth.
   清理牙齿后，我发现我的牙齿上有一些牙菌斑的堆积。
3. 3. Thedentist explained that regular dental check-upsare essential for maintaining good oral hygiene andpreventing dental problems.
   牙医解释说，定期的口腔检查对于保持良好的口腔卫生和预防牙科问题至关重要。