Fluorid
n. 氟化物
🗣️ 情景例句
I don't usually listen to the weather. They never get it right!
我不怎么听天气预报。他们总报不准。
Satan always finds work for idle hands.
懒汉总会干坏事。
I left the bag in the hall and Robert and I went into the living room where we talked for a couple of hours.
我把纸袋放在门厅里，与罗伯特一起进了起居室，在那里聊了好几个钟头。