Polyarsenite
红砷锰矿
🗣️ 情景例句
What a bargain! Thanks for helping me with this shopping.
真是太划算了！谢谢你带我买这些东西。
It is good to have some friends both in heaven and hell.
天堂上和地狱中都有几个朋友，这乃是一件好事。
Settlers made agreements with Native American cheifs but always broke them afterwards.
殖民者同美洲土著人的首领达成了协议，但是这些协议随后总是被撕毁。