Tectrices
n. 覆羽（指蔽覆羽翮基部的羽毛）( tectrix的名词复数 )
🗣️ 情景例句
About what?
关于什么
I will play it by ear.
我会见机行事的。
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。