shuǐ / zhōng / jiā / rù / fú / huà / wù / jìn / xíng / fú / huà / chǔ / lǐ / kě / yǐ / yù / fáng / qǔ / chǐ

水中加入氟化物进行氟化处理可以预防龋齿

Adding fluoride to water for fluoridation treatment can prevent tooth decay