Mucoperiosteum
[医] 粘膜骨膜
🗣️ 情景例句
A lot of people come to openings
许多人参加开幕仪式
Never say die! Up man, and try.
不要气馁，朋友，振作起来，干！
That's why we were getting anxious about you.
所以我们才为你们担心。