Lapboard
n. 膝板
🗣️ 情景例句
Will you be my fiancée?
你想成为我的未婚妻吗？
Don't you have a heart?
你有没有良心啊？
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。