Monogenoidea
单殖纲
🗣️ 情景例句
Nope.
不对。
Who is speaking?I don't recognize your voice.
阁下是那一位？我听不出你的声音。
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）