Chalcolite
铜铀云母
🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
I know the boy whose father is an architect.
我知道那个男孩的父亲是建筑师。
Yes. It's time for class. Let's go.
是的。上课的时间到了。我们走吧。