jiān / chí / shuā / yá / hé / shǐ / yòng / yá / xiàn / yǒu / zhù / yú / yù / fáng / yá / zhōu / bìng

坚持刷牙和使用牙线有助于预防牙周病。

Brushing regularly and using dental floss can help prevent periodontitis.