Lily的Scalers Talk第八轮新概念朗读持续力训练Da

Lesson 7-2        Bats

Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish. With experience, and with improved apparatus, it is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.

It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstacles -- or locate flying insects on which they feed. This echo-location in bats is often compared with radar, the principle of which is similar.

shoal  /ʃoʊl/  鱼群

comparative /kəmˈpærətɪv/ 比较的;相比的;比较而言的;

herring /ˈherɪŋ/  鲱鱼

cod /kɑːd/ 鳕鱼;

pattern /ˈpætərn/ 图案;模式;方式

squeak /skwiːk/ 吱吱声;尖叫声

emit  /iˈmɪt/  发出;射出;散发

steer /stɪr/ 掌控方向盘;行驶;操纵;           steer clear of  避开

obstacle/ˈɑːbstəkl/  障碍;阻碍;绊脚石;

radar /ˈreɪdɑːr/  雷达