Difluoride
二氟化物
🗣️ 情景例句
Don't be so sensitive.
别太敏感。
I want to change some British sterling into Renminbi.
我想把一些英镑换成人民币。
' I continued driving and after some time,the examiner tapped loudly,
”我继续往前开着。过了一会儿，主考人砰砰地敲了起来。