Endlichite
砷釩鉛礦
??? 情景例句
I have worked hard at my major subject.
我對主修課特別用功。
Excuse me? I didn't hear what you said.
對不起，我沒有聽清你說的話。
It's Dr Stone, isn't it? She's usually good.
是斯通博士，對嗎？她一直很不錯的。