Thoreaulite
钽钖矿; 钽钖矿
🗣️ 情景例句
Advice doesn't normally come cheap, but this piece is for free...
通常来说，忠告都是价值不菲的，但这个是免费赠送的。。。
The master always exacts quality work from his students.
老师常常要求学生们认真踏实的完成功课。
How do you go to work everyday?
你每天怎么上班？