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Unit 4a bit of 一点a cloud of energetic dust具有能量的尘埃a friendly atmosphere一种友好的氛围a solid globe固体球体a widely accepted theoryall over the world 遍布世界allow/permit sb to do sth 允许某人做某事allow/permit doingbe puzzled about 对…感到困惑what puzzles sb is that….另某人感到困惑的是…become extinct=die out灭绝be different from 与……不同be fundamental to是…的基础fundamentally从根本上be harmful to/do sb harm/do harm to sb 对…有害be in time for sth/to do sth及时，最终be lucky enough足够幸运,be off启程,be to do sth.become violent变得激烈block out the sunlight挡住（光线）block out挡住；忘记,抹去;sth escape sb break out 爆发break upbreak downbreak off 停止，中断;( cut off )break in 闯入；插话=cut inbreak into 硬闯入；突然开始(大笑、欢呼等) break into tears/laughter=burst into tears/laughter=burst out crying/laughing break through 突破break away from...脱离,摆脱cheer up高兴起来, 振奋起来combine into…合成……combine with/in combination with与…结合cool ( sth.) downcool down冷却,镇静下来come into existence出现，产生，开始存在climate 气候；(某一社会或时代的)风气,趋势；(政界或学术界的)气氛; crash碰撞，(飞机)坠毁，(电脑)死机，破产; crash into sth撞到某物exist on/live on靠…为生depend on/rely on/count on依靠，依赖，取决与……,depend on/rely on it that…It depends/That depends视情况而定develop diseases/cancer患病、得了癌症develop drugs研发新药develop life发展生命develop the film 冲洗胶卷dissolve harmful gases分解，溶解有害气体, escape from… into…从……逃离到……, escape doing sth 逃避做某事explode loudly猛烈爆炸explode with anger勃然大怒fall over摔倒fall to the ground朝地上落下去,feel the pull of the earth感觉到地球的拉力, fill…with…用……填充……float weightlessly around失重飘来飘去,get close to…接近……,be exhausted / be tired out / bet worn out/give out筋疲力尽的get the hang of (doing) sth.掌握=have a good knowledge/command of精通/掌握give birth to 产生，分娩,孕育as time goes by/with time going by随着时间的流逝go/move a round the sun环绕太阳运转in one’s turn轮到，接着in turn轮流，依次；转而，反过来；by turns 轮流take turns to do sth轮流做某事in the spaceship cabin在太空船舱,in theory在理论上lay eggs 下蛋multiply乘，增加，繁殖make a trip into space去太空旅游make it possible for sb. to do sth.millions of years to come未来的数百万年now that 由于；既然prevent/keep/stop…from…防止……做……, protect/shelter..from…保护…免遭…produce a chain reaction产生连锁反应produce a gun from his pocket从口袋里面掏出一把枪produce the water vapour产生水蒸汽produce young生出幼仔push…into the seat把……推向座位, resolve解决，决定rise into the air升入太空,in all directions=in every direction四面八方solar system 太阳系spread(疾病)传播，(谣言)散布，(火势)蔓延，(微笑)绽放spread all over the earth遍布全世界,step forward向前迈步,think of…as/look on..as../refer to ..as../ regard…as../consider..as../treat..as..把..看作是twice as far as是……两倍远twice as large as …/ twice the size of …/ tw ice larger than …是…的两倍大watch out for 小心，当心a mass of/masses of大量的(可数,不可数均可）= plenty of, , a quantity of, quantities ofin no time 立即；马上at no time/by no means/in no way/in no case/on no condition/on no account 绝不at a time 一次；每次at one time 曾经；一度at times 有时ahead of time 提前for the time being 暂时take one’s time 别着急；慢慢来It’s high time that sb. did/should do sth.It/that/this is the first time that sb have/has done sth;It/that/this was the first time that sb had done sthThe first time+句子,+主句= when +句子+for the first time,+主句…..pull sth. down拆毁pull in/into驶进站pull out 驶出站pull over:驶向路边停pull u p 停车pull through 康复；渡过难关die of/from因..而死die away逐渐减弱或消失die down逐渐减弱或消失die off相继死去die in one’s bed善终，寿终正寝be dying for sth/to do sth渴望，极想做某事like/dislike/unlike; be/look alike;it is likely that../be likely to do sth 可能…典型句式运用1. be to do sth.1)表按计划或安排将要做某事：The Queen is to visit Japan in a week’s time2)注定会：They said goodbye, little knowing they we re never to meet again.3) Ann was no where to be found.4)If we were to offer you more money, would you stay?2．the first, the second，the last 等序数词常与不定式连用He is always the first to come and the last to leave.3.so+ adj./adv+ that…; so+ adj.+ a/an+ n +that…; so+ many/much/little/few +n.+that…such+ a/an+ adj.+ n+ that…; such+adj.+n.+that…be in such a hurry that…4.as+ adj./adv+ as; as+ adj.+ a/an+ n; as+ many/much/little/few +n.5.倍数表达法: 翻译：这条河是那条河的三倍长。
