Cheleutite
砷铋钴矿
🗣️ 情景例句
Sure. Oh, sorry, Mary, I'd better go now.
可以。哦，抱歉，Mary，我要挂电话了。
How long could the buyer expect your product to last?
购买者期望你们产品的使用期是多久呢？
Last November it was Class 3's turn.
去年11月，轮到3班去参观了。