Fluoridizer
氟化剂, 氟化器
🗣️ 情景例句
Three--t-h-r-e-e.
Three t-h-r-e-e。
He who has no shame has no conscience.
没有廉耻的人，没有良心。
In this shop you can buy school things.
你可以在这个商店里买到学习用品。