Kettnerite
氟碳酸盐铋钙石
🗣️ 情景例句
I'm pretty independent.
我是独立性很强的人。
Did you repair this yourself?
你自己亲自修理这个？
The young man did not wake up until the bed had struck the ground.
那年轻人直到床撞到地上才醒了过来。