Fluorapatite
[医] 氟磷灰石
🗣️ 情景例句
Have you been waiting for me for a long time?
你已经等我很久了吗？
Yes,I had breakfast two hours ago.
是,我2小时以前吃了早餐。
I still think we should buy the IBM PC586.
我仍然认为我们应该买IBM586的。