Someone told me you're the computer expert around here. Weel, I have a question for you...
有人告诉我你在这里是计算机专家,我有个疑难想请教你。。。
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。