Fluoridating
v. 在饮水中加少量之氟（以防儿童蛀牙）( fluoridate的现在分词 )
🗣️ 情景例句
going to the children's ward once or twice a week
每星期就去小儿科病房一、两次
Without a friend the world is a wilderness.
没有朋友，世界就等于一片荒野。
Soon there were many wild horses across the country.
不久，乡间就有了许多野马。