Petscheckite
铌钽铁铀矿
🗣️ 情景例句
He has a reputation for honesty.
他以诚实著称。
Which country do you come from?
你从哪一个国家来？
Some children can cover the whole length of the pool without coming up for breath even once.
有些孩子能够跑完游泳池的全长而不用露出水面换气。