Davisonite
[矿]板磷钙铝石
🗣️ 情景例句
What are you trying to say?
你想说什么？
Would you mind closing the window for me?
能帮我关一下窗户吗？（你介意关下窗户吗？）
Which one is cheap? Which one is dear?
哪一支便宜？哪一支贵？