Cristae sacralis mediana
[医] 骶中嵴
🧩 词语组成解析
[医] 嵴
🗣️ 情景例句
You were right, Robbie.
你做对了， Robbie。
Call me tomorrow if you don't feel better.
明天如果没有好转，就打电话给我。
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）