Rontgenite
氟维钙铈矿
🗣️ 情景例句
They are above average 85. I'm among the upper third of my class.
我的平均成绩在85分以上。我是全班第三名。
I'm sorry. Has it been bothering you?
对不起，打扰你了？
At what time can we work out a deal?
我们什么时候洽谈生意？