Kettnerite
氟碳酸盐铋钙石
🗣️ 情景例句
I'm going to play with a group of friends.
我打算和朋友一起玩。
Would you care to answer my question on the warranty?
你可以回答我有关保证的问题吗？
I've had enough of your garbage.
我听腻了你的废话。