Fluorides
n. [无化] 氟化物, 氰化物（fluoride的复数形式）
🗣️ 情景例句
The book impressed a lot of people.
那本书在很多人心中留下深刻印象。
Do you have a visa?
你有签证吗？
Open the window and air the room.
打开窗子，给房间通通风。