Petit's triangle
[医] 波替氏三角, 腰三角
🧩 词语组成解析
🗣️ 情景例句
It's true.
对。
I tried calling you several times yesterday but I couldn't get through.
我昨天给你打了几次电话，但都没有打通。
Half the world's telephone calls are made in English.
全球1/2的电话是用英语打的。