Fluorides
n. [无化] 氟化物, 氰化物（fluoride的复数形式）
🗣️ 情景例句
But I have a doctor's appointment in the afternoon.
但我后天下午跟医生约好了。
One flower makes no garland.
一木不能成林。
Lights were blazing and men were running here and there: they had just discovered that a prisoner had escaped.
他们刚刚发现有一个俘虏跑了。