Kalkowskite
高铁钛铁矿, 铈钇钛铁矿
🗣️ 情景例句
I certainly am. May I help you?
我是，我能帮您什么忙吗？
I've asked Mr. Lee for his guidance in conducting myself here.
我让李先生指导我在这里如何立身处世。
At this, the police pointed out ironically that this would hardly be necessary as the men were already under arrest.
警察听后讥讽地说，这大可不必，因为他俩已被逮捕了。