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。
新概念英语第四册
Lesson 7 Bats
📚 句中词汇解析
从本句中提取的重要词汇
adj. 非凡的;特别的;非常奇特的;
💡 extra超过+ordinary普通的 → 特别的
"It is very extraordinary that I should meet him here."
很奇怪,我在这儿碰上他了.
近义：particular, peculiar, single, singular, huge, imposing
反义：idle, immaterial, inconsequential, inconsiderable, insubstantial, meaningless
n. 发现，发觉;（剧情的）发展;被发现的事物;[法]显示证据;
💡 discover发现+y表名词 →掀开 → 发现
"The discovery of distillation is usually accredited to the Arabs of the 11th century."
通常认为，蒸馏法是阿拉伯人在11世纪发明的。
近义：invention, strike, disclosure, find, finding
n. 回声，共鸣;（言语、作风、思想等的）重复;重复者;[无线电]回波;
vt. 重复，效仿;随声附和;类似;发射（声音等）;
vi. 被重复;产生回响;充满回声;
💡 echo-, ech- 表示”声音 ,噪音”;特备是”回声”;”重复,模仿”
"There was an echo on the line and I couldn't hear clearly."
电话里有回音，我听不清楚。
近义：repeat, reecho, resonate, resound, reverberate, boom
n. 位置，场所;定位;外景（拍摄地）;
💡 loc 地方 + ation 行为、状态、过程 → n.位置，场所
"a honeymoon in a secret location"
在一个秘密地点度的蜜月
近义：locality, place, position, site, siting, whereabouts
n. （实）例，事例;情况，状况;诉讼（事件），案件，判例;容器（箱，盒）;
vt. 把…装入箱（或盒等）内;加盖于;包围，围住;[俚语]（尤指盗窃前）探察，侦查，窥测;
💡 cas(to fall)+e→事件；事情；场合；状态；诉讼事件；患者
"They filed an application to have their case heard early."
他们申请早日审理他们的案子.
近义：incident, instance, occasion, occurrence, opportunity, circumstance