Knauffite
钡钒铜矿
🗣️ 情景例句
Haven't we met before?
我们没见过吗？
I'm giving you a gift.
我送给你一件礼物。
A man may acquire great knowledge of topics unconnected with his daily work,
一个人可能会获得与其日常工作无关的某些课题的渊博知识，