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【句子】 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. Thisecho-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——或者找到它们赖以为生的昆虫。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。 【解析】 1.emit 1)vt. 散发,放出,发出(气味、光、热、粒子等) The sun emits light. 太阳放出光。 the refreshing fragrance emitted by perfumes 香水发出的令人清爽的香味。 2)vt.喷出,喷射,排出(液体、气体等): Geysers emit water. 间歇温泉喷出水来。 The chimney emitted smoke. 烟囱冒烟。 3)vt.发出(声音等) She emitted one shrill cry and then was silent. 她发出一声尖叫,然后沉默了 4)发行(纸币、书报等) ;发表(意见等) Jack emitted a curse. 杰克诅咒了一声。 2.squeak 1)n. 短促的尖叫声,吱吱的叫声;尖厉刺耳的噪音 ;[口语]幸免于难,死里逃生,脱险 These mice were also more likely than control mice to emit ultrasonic squeaks—a type of mouse love song—toward other males. 试验鼠也比对照组发出更多的超声波级别的尖叫声——一种对其他雄鼠的情歌 2)vi. 发出短促的尖叫声,吱吱叫;发出尖厉刺耳的噪音 The milk cart squeaked out of the village. 运奶车吱吱地响着慢慢驶出了村子。 3)vi.[口语]勉强通过;勉强应付;险胜(by, through) to squeak through one's maths exam 数学考试勉强及格 I know I'll be confronted with difficulties, but I will squeak by anyway. 我知道我会遇到许多困难,可我无论如何总能应付过去。 4)vt. 使发出吱吱声,使嘎吱作响;使尖叫 She squeaked out a cry at the sight of a shadow. 她被一个黑影吓得尖叫起来。 5)vt.尖声说出,以尖厉的声音发出(out) to squeak out curses 尖声叫骂 The zebra squeaked out shrill cries as it was caught by a lion. 斑马在被狮子抓住时,发出了凄厉的叫声。 3.echo 1)n. 反响,回响;回声,回音 ;[有时用复数]反响;后果 The echoes died [faded] away. 回声消失了。 2)vi.发出回声,产生回响,反响,起反响,回响;回荡;(声音)被传回;起共鸣 The hall echoed with cheers. 欢呼声响彻大厅。 3)vi.被重复,重复别人的话语(或思想、感情、行动等);仿效别人的风格(或谈吐等),被仿效: Shouts echoed through the street. 喊叫声在街上回荡。 4)vt.发射(声音等),发出…的回声 The big ball echoes the faintest sounds. 最微小的声音在这大厅里也会产生回响。 5)vt.重复(或模仿)(别人的)话(或思想感情等);(随声)附和 The pupil echoed his teacher's words. 小学生重复老师的话。 They echoed every word of their leader. 他们随声附和他们领导人的每句话。 6)vt.类似;与…相似,像 The student and his teacher echoed each other in writing style. 学生和他老师在创造风格方面彼此相似。 4.steer 1)vt.把掌…的舵;驾驶,操纵(飞机、汽车等): to steer a plane 驾驶飞机 to steer a car 驱车 to steer a bicycle 骑自行车 2)vt.沿着(某方向)前进;采取…的方针 We steered a correct defence policy. 我们采取了正确的防御方针。 3)vt.[口语]指导,引导;操纵,控制 I can steer you to the best hotel in the city. 我可以把你带到本市最好的饭店。 to steer someone in his English study 指导某人学习英语 4)vi.掌舵,驾驶飞机(或汽车等);(车、船、飞机等)被驾驶;驾驶起来 He steered out of the expressway and then let me drive his car. 他把车驶出高速公路,然后让我驾车。 5)同根词 词根: steer adj. steerable 易驾驶的;可操纵的;易改变位置的 n. steering 操纵;指导;掌舵 steerage 统舱;舵效;操舵;驾驶;管理;士官的二等室 steerer 舵手;司机,驾驶者 v. steering 驾驶;掌舵(steer的ing形式) 【今日练习】 1、They _________ high frequency pulses of sound through their mouth or nose which bounce off surfaces and objects around them. A.deliver B. emit C.issue D.ray 你可能还感兴趣的相关文章 |
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发布于:2015-05-27 22:58
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