100句话7000单词-Day99

Day99. 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. 
人们已经发现，某些蝙蝠发出尖叫声并靠接受回响来锁定和避免障碍物——或者找昆虫吃。蝙蝠这种回响定位法常拿来和原理与之很相近似的雷达相比。 Emit [ɪˈmɪt] vt.发出;发射;颁布;发表 A fixed star can emit light and heat by itself. 恒星本身发光发热。 Polly blinked and emitted a long, low whistle. 波莉眨了眨眼，吹了一声低沉而悠长的口哨。 It is unlawful for factories to emit black smoke into the air. 现在，工厂往空气中排黑烟是违法的。 squeak [skwik] n.短促的尖叫声，，吱吱的叫声;尖厉刺耳的噪音;机会 vi.短促地尖叫，吱吱叫;发出尖厉刺耳的噪音;告密 vt.以尖厉的声音说话;使发出吱吱声 Mice squeak. 老鼠吱吱叫。 My father had a narrow squeak in the automobile accident. 我父亲在这次车祸中死里逃生。 We managed to squeak through the match. 我们终于设法险胜了这场比赛。 Echo [ˈekoʊ] 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 His feet echoed on the bare board floor 他的脚步声在没铺地毯的木地板上发出回响。 I hear an echo of the thinking that got us into this mess in the first place 我听到有人重提那个最先使我们陷入这一困境的想法。 Steer [stɪr] vt.& vi.引导;驾驶;操纵，控制 vt.掌（舵） vi.行进 n.阉公牛，肉用公牛;〈美俚〉建议;关于行路（或驾驶）的指示 What is it like to steer a ship this size? 驾驶这么大的船感觉怎么样？ Nick steered them into the nearest seats. 尼克将他们领到最近的座位上。 The new government is seen as one that will steer the country in the right direction 新政府被认为能将国家引向正确的方向。