Petscheckite
铌钽铁铀矿
🗣️ 情景例句
I'm totally exhausted by the time I get home.
等我回到家，已经累得精疲力竭了。
I am very happy that you have come all the way from the United States to visit our company.
您不远千里从美国来我公司访问，我们感到非常高兴。
the mind catches hold of something and will not let it go.'
此时脑子纠缠住了某种东西又不肯松手。"