Hjelmite
钙钽钇矿(原译名钙铌钽矿)
🗣️ 情景例句
It's nice to meet you.
很高兴见到你 。
Do you often study history on Saturday?
你常常在星期六学历史吗？
he has just bought a new house in the city,
他刚在城里买下一所新房子，