Fluoram
二氟化铵
🗣️ 情景例句
Are you ready for a lifetime commitment?
你准备以身相许了吗？
She has always a gracious smile.
她脸上总是带着和蔼可亲的微笑。
We'll still be able to meet the deadline.
我们还是可以赶上最后期限的。