Polyarsenite
红砷锰矿
🗣️ 情景例句
How can I get in touch with you?
我怎样和你联系呢？
I played upstairs yesterday.
我昨天在楼上玩。
We had some shoes like those a month ago,but we don't have any now.
一个月前我们有这要的鞋。但是现在没有了。