M. m.
[医] 粘膜
🗣️ 情景例句
and I'm giving some thought to a new book on a different subject.
如今我又开始在构想另一本不同题材的新书。
He who wants a mule without fault, must walk on foot.
如要骡子无缺点，只有自己徒步行。
Keep in touch.
保持联系。