Predynastic
a. (尤指公元前3100年古埃及的) 王朝统治以前的
🗣️ 情景例句
You've been very thoughtful.
你一直都很周到。
It's been cloudy all morning.
整个早上多云。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。