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現，就可以探究一下聲音在什么情況下有絕對的實用價值。
新概念英語第四冊
Lesson 7 Bats
?? 句中詞匯解析
從本句中提取的重要詞匯
adj. 非凡的;特別的;非常奇特的;
?? extra超過+ordinary普通的 → 特別的
"It is very extraordinary that I should meet him here."
很奇怪,我在這兒碰上他了.
近義：particular, peculiar, single, singular, huge, imposing
反義：idle, immaterial, inconsequential, inconsiderable, insubstantial, meaningless
n. 發現，發覺;（劇情的）發展;被發現的事物;[法]顯示證據;
?? discover發現+y表名詞 →掀開 → 發現
"The discovery of distillation is usually accredited to the Arabs of the 11th century."
通常認為，蒸餾法是阿拉伯人在11世紀發明的。
近義：invention, strike, disclosure, find, finding
n. 回聲，共鳴;（言語、作風、思想等的）重復;重復者;[無線電]回波;
vt. 重復，效仿;隨聲附和;類似;發射（聲音等）;
vi. 被重復;產生回響;充滿回聲;
?? echo-, ech- 表示”聲音 ,噪音”;特備是”回聲”;”重復,模仿”
"There was an echo on the line and I couldn't hear clearly."
電話里有回音，我聽不清楚。
近義：repeat, reecho, resonate, resound, reverberate, boom
n. 位置，場所;定位;外景（拍攝地）;
?? loc 地方 + ation 行為、狀態、過程 → n.位置，場所
"a honeymoon in a secret location"
在一個秘密地點度的蜜月
近義：locality, place, position, site, siting, whereabouts
n. （實）例，事例;情況，狀況;訴訟（事件），案件，判例;容器（箱，盒）;
vt. 把…裝入箱（或盒等）內;加蓋于;包圍，圍住;[俚語]（尤指盜竊前）探察，偵查，窺測;
?? cas(to fall)+e→事件；事情；場合；狀態；訴訟事件；患者
"They filed an application to have their case heard early."
他們申請早日審理他們的案子.
近義：incident, instance, occasion, occurrence, opportunity, circumstance