Davisonite
[矿]板磷钙铝石
🗣️ 情景例句
I don't have time to take any elective classes.
我没有时间去上任何选修课。
May I see your boarding pass?
我能看你的登机牌吗？
Is he? I'm sorry to hear that.
是吗？对此我感到遗憾。