Mesopterygium
（中鰭骨）中鰭軟骨
??? 情景例句
He met his girfriend throught a public chat room.
他是在一個(gè)公共聊天室里認(rèn)識(shí)他女友的。
I ate peaches for breakfast yesterday.
我昨天早飯吃的是桃子。
The secret lies in the title of the book which he wrote about his early life, The story of my experiments with truth.
秘密在于他寫的那本關(guān)于他自己早期生活的《我體驗(yàn)真理的故事》一書。