🗣️ 情景例句
Don't call my cell phone while I'm on vacation.
我在度假的时候别打我的移动电话。
Once a knave,ever a knave.
一次成无赖，永远是无赖。
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。