That sounds reasonable. Let me think it over. And I'll call you back to make reservations.
听起来价钱还算公道。让我考虑一下,我会再打电话预定。
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。