Mendeleyevite
钙铌钛铀矿
🗣️ 情景例句
He treated his employees with exceptional cruelty.
他对雇员非常残酷。
When are you going to swear off cigarettes?
你打算什么时候发誓戒烟？
They may also have used wood and skins, but these have rotted away.
他们也可能用过木头和兽皮，但这类东西早已腐烂殆尽。