Rontgenite
氟维钙铈矿
🗣️ 情景例句
Take it easy, sir. I'll need your name, in full, and what's happened.
别着急，给我你的全名和事情的情况。
There is no friend so faithful as a good book.
最忠实的朋友莫过于一本好书。
To my surprise, he gave me the money immediately.
令我惊奇的是，他立刻把钱给了我。