Plumbocolumbite
铅铌铁矿
🗣️ 情景例句
No, thanks.
不用了， 谢谢。
Mr. Smith is a politician.He's running for election as governor.
史密斯先生是竞选州长的一名政治家。
Hi, Jim. What's the time?
喂，吉姆， 几点了？