Scheelitine
钨铅矿
🗣️ 情景例句
that will bring parents and teachers together once a week
让家长们及教师每星期一次
As the wind blows, you must set your sail.
趁风启帆。
Don't touch anything unless your teacher tells you to.
除非老师允许，否则你不要动任何东西。