Florocid
氟化钠
🗣️ 情景例句
What do you like to do during holiday?
在假日你喜欢做什么？
I put some photographs in the envelope.
我在信里夹了几张照片。
I simply don't know. He may have plans, but he hasn't yet spoken to me about them.
我一点儿都不知道。他也许有计划，但他还没跟我谈他的想法呢。