Mutual agency
[经] 相互代理
🧩 词语组成解析
🗣️ 情景例句
That's only part of it.
这只是一部分原因。
Why didn't you go?
为什么你不去？
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。