Fluorides
n. [无化] 氟化物, 氰化物（fluoride的复数形式）
🗣️ 情景例句
We have another appointment on the same day.
我们那天有另外一个约会。
Why did't you go home?
为什么你不回家？
Mrs Brown went to see her doctor.
布朗太太去医生那里看病。