Schalfnerite
铜钒铅锌矿
🗣️ 情景例句
What can I do to cheer her up?
我要怎么做才可以让她振作起来？
I worked as an intern in that firm last summer.
去年夏天我在那家商行实习。
Do you know what they are?
你知道他们是干什么的吗？