Polyarsenite
红砷锰矿
🗣️ 情景例句
I'd like your help.
我要请你帮忙。
My book has a dark blue cover.
我的书有一个深蓝色的封面。
We don't have any different opinions about the contractual obligations of both parties.
就合同双方要承担的义务方面，我们没有什么意见。