Fluoridizer
氟化剂, 氟化器
🗣️ 情景例句
What kind of farm does he have?
他的农场是什么样的？
I don't know anything about that.
关于那个我什么都不知道。
As his flat is in a large town, he has no garden of his own.
他住在大城市里的一所公寓里，没有自己的花园。