Pero-
[医] 残缺, 不全
🧩 词语组成解析
[医] 嗅球外层
🗣️ 情景例句
I'm not so young anymore.
我不再那么年轻了。
A fault confessed is half redressed.
承认错误，等于改正一半。
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）