Flexura perinealis recti
[医] 直肠会阴曲
🧩 词语组成解析
n. (=flexure)曲折, 折曲
rectus 的复数
🗣️ 情景例句
You'd better watch your step or you'll get into trouble again.
你最好留点儿神， 免得再惹麻烦。
I know the boy whose father is an engineer.
我知道那个男孩的父亲是工程师。
that a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
才在大西洋测得一个个海水深度，同时通过挖掘海底，取得了研究海底的首批样品。