Bismutite
泡铋矿
🗣️ 情景例句
Mr. Carlson will be with you shortly. Carlson
先生不久就可以见你。
I asked him to pay, but he wouldn't.
我请他付账，但是他不肯。
it naturally limits all those engaged in carrying it out from effective contact
那些从事科研的人员自然受到了限制。他们不能进行有效的接触