Afghai
n. 阿富汗幣
??? 情景例句
Is room service available?
有房間服務嗎？
That's impossible.
那是不可能的。
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.
我們只要看一看蝙蝠回聲定位這一極不尋常的發(fā)現(xiàn)，就可以探究一下聲音在什么情況下有絕對的實用價值。