Pentasulfide
五硫化物
🗣️ 情景例句
I have no spare time for hobbies or activities.
我没有时间去爱好什么。
What are you doing?
你正在做什么？
Yes. I'd like to invite you to dinner at my flat before I move.
好的。我想在搬家前请你到我家吃饭。