Gerodontology
[医] 老年牙医学
🗣️ 情景例句
Thank you, Philip.
谢谢你， Philip。
How did you recognize him?
你是如何认识他的？
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，