Chaetotaxy
毛序
🗣️ 情景例句
He pulled him out of the water.
是他把你孩子从水 拉上来的。
I'm short of hands.
我太忙了。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。