Fluoridizer
氟化剂, 氟化器
🗣️ 情景例句
Does this store sell bubble bath?
这家店里卖泡沫浴液吗？
I remember the girl whose father earns $ 300 a day.
我记得那个女孩的父亲一天赚三百元。
When a light passenger plane flew off course some time ago, it crashed in the mountains and its pilot was killed.
不久前，一架轻型客机偏离了航线，在山区坠毁，飞行员丧生。