Gratonite
细硫砷铅矿
🗣️ 情景例句
Sure. We've been in business about five years now.
当然。我们创业至今有五年的历史。
We have a small gift for you to take with you when you leave the factory.
你离开工厂时，我们有件小礼物要送给你。
I insist that you give me my money back.
我要求你把钱退给我。