Davisonite
[矿]板磷钙铝石
🗣️ 情景例句
The fifth word.
第五个字。
I'm very much obliged to you.
非常感谢您。
My pen dropped on the ground when I was walking in the park.
当我在公园里散步的时候，我的钢笔掉到地上了。