Petersen's operation
[医] 彼得逊氏手术(高位切石术的改良法)
🧩 词语组成解析
🗣️ 情景例句
It's John. Didn't you recognize my voice?
我是约翰。你没听出我的声音？
It is wisdom sometimes to seem a fool.
大智若愚。
I went further back into the cave and stopped still.
我向前走拐进岩洞，停住不动。