Petscheckite
铌钽铁铀矿
🗣️ 情景例句
Oh, how do you do, Xiao Fu. This is Mary.
哦，你好，小付。我是Mary。
Long tarrying takes all the thanks away.
事情耽搁太久就没有人会感谢了。
This lunch is on me today,
今天这顿饭算我请客。