Basis ossis sacri
[医] 骶骨底
🧩 词语组成解析
basis
['besɪs]
n. 基础;主要成分;基准，基本原则;
骨髓腔
🗣️ 情景例句
You remember that day, Robbie?
你还记得那天吗 Robbie
I think you have made a right decision.
我认为你们做出了正确的决定。
Yes?What's the letter.
怎么了？怎么回事？