Polios
(polio 的复数) n. 脊髓灰质炎, 小儿麻痹症\\n[医] 脊髓灰质炎
🗣️ 情景例句
Thank you.
谢谢 。
Would you please pass me the sugar?
可以请你把糖递过来吗？
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）