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
if I may have your attention for a moment, please?
我想占用你们一点点时间 好吗
This is Lesson One.
这是第一课。
If she finds out you spilled ink on her coat, she'll blow her stack.
如果她发现你在她上衣上洒了墨水，她会大发脾气的。