Mendelyeevite
(=mendeleevite)钙铌钛铀矿
🗣️ 情景例句
Good morning, Mr. Smith. I brought the contract you are been looking for.
上午好，斯密司先生。我带来了你要等待的合同。
Rivers need a spring.
大河要有源头。
Good morning, sir.
先生，早上好。