Mesopterygium
（中鳍骨）中鳍软骨
🗣️ 情景例句
He met his girfriend throught a public chat room.
他是在一个公共聊天室里认识他女友的。
I ate peaches for breakfast yesterday.
我昨天早饭吃的是桃子。
The secret lies in the title of the book which he wrote about his early life, The story of my experiments with truth.
秘密在于他写的那本关于他自己早期生活的《我体验真理的故事》一书。