M. m.
[医] 粘膜
🗣️ 情景例句
Do you hike or fish on your trips?
旅游时，你会步行或钓鱼吗？
This area is noted for its rich soil.
这个地区以土壤肥沃着称。
Tickets, please! Tickets, please!
请出示车票！请出示车票！