Headrace
n. 导水渠, 送水渠
🗣️ 情景例句
The airport rescheduled a flight.
机场改变了航班时间。
Choose an author as you choose a friend.
选书如择友。
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。