Petit's triangle
[医] 波替氏三角, 腰三角
🧩 词语组成解析
🗣️ 情景例句
That's my boy!
好儿子！
In college I majored in math, What was your major?
大学时我主修数学，你主修什么呢？
You may pick whichever one you like best.
你可以挑你最喜欢的。