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1、精品systematic adj.（ 有）系统的；有条理的Unit 4 Astronomy: the science of the stars-可编辑-1. violent adj. 强暴的,猛violence n.暴力，强violently adv.强暴烈的暴；猛烈地；猛烈地2. fundamental adj.基本fundamentally adv.fundament n.基础；（础）的n.pl.基本原则基本地；根本地根本（法则）3. development n. 生长，develop vt.发展；产developed adj. 发达发生的 developing adj. 发展；新情况vi
2、.生长；发展展的词形4. lay vt.放下;摆设；产（蛋）lie vi.躺，平放；位lie n.&vi. 谎话；说谎变化laylaidlaidlayi于lieliedliedlyinglielaylainlyingng5. prevent vt.预防，防止prevention n. 预防；preventable adj. 可防阻止；妨碍止的，可预防的6. gentle adj. 和蔼的；轻gently adv.温和地；柔的静静地7. physics n.物理，物理学physicist n.物理学家physical adj.身体的；物理（学）的；物质的1. system n. 系统，体系；制度
3、systematically adj. （有）系统地；有条理地搭配：the solar system 太阳系the capitalist system资本主义制度The computer system broke down.The teacher has a special system of teaching.a railway system铁路系统计算机系统瘫痪了。2. theory n. 学说；理论 反义：practice 实践Darwins theory ofevolution达尔文进化论The theory of relativity 相对论这位老师教学方法很独特。Einstein
4、put forward his new theory of relativity.3. violent (adj.) 猛烈的；激烈的；a violent attack 猛烈的进攻 violent dislike 极其的厌恶 violent pain极度痛苦船在海上强烈的风暴中沉没。The boat sank in a violent storm at sea.4. in time: (sooner or later; eventually;)迟早，终于I ll see him in time.总有一天我会遇见他。(for sth. /to do sth.): not late 及时She wi
5、ll be back in time to prepare dinner.她来得及回来准备晚饭。与time 相关的短语:on time 按时;准时at one time 从前 for the time being 暂时from time to time不时地in no time立刻，马上at times 有时at a time每次;依次once upon a time 从前5. unlike prep. 不同； 不像Unlike him, his son is tall. adj. 不同的The sisters are quite unlike.unlikely adv. 未必的；不太可能的；
6、 注意与dislike 不喜欢区分开来。7. exist vi. 存在；生存existent adj.存在的；生存的existence n.存在；生存搭配：exist in 存在于之中 exist on 靠为生 =live on） exist by 靠生存in existence 现存的 come into existence=come into being开始存在、 成立They can t exist on the money he is earning.The idea exists only in the minds of poets.When did this world come
7、into existence?8. give birth to1）生（孩子）She s just given birt h to a healthy baby girl.她刚刚生了个健康的女婴。2）产生The extraordinary experience gave birth to his latest novel.这段奇特的经历促成了他的最新的一部小说的诞生。9. in one s turn 轮到某人It s in your turn to read the passge.He cooked the meal in his turn this week.X in turn 依次、轮流Pl
8、ease enter the room in turn.X by turns 轮流We kept watch by turns . 我们轮流守望。10. prevent sth. / sb. （from） doing sth.制止（防止）某人（某物）做某事Nothing can prevent this plan from being carried out.阻止某人做某事prevent sb. （from） doing sth.stop sb. （from） doing sth.,keep sb from doing sth注意：keep sb. from doing sth. 中from
9、不可省略，但如在被动语态中，他们中的from 都不可省。11. puzzle n 迷，难题v （使）迷惑；（使）为难Can you figure out this puzzle?你能找到谜底吗？His behavior yesterday puzzled me .他昨天的行为使我迷惑。12. pull n.（c）拉力；牵引力；扯引力If we want to make a trip into space, we must escape the pull of gravity.2）（对他人的）影响，影响力She has a lot of pull in that company.3）吸引力（常用
10、单数）The tides depend on the pull of the moon.4）拉，牵，扯（反义词：push）Help me move this piano; you pull and I ll push.13. cheer up 感到高兴；感到振奋We cheered up at the news.cheer v. 力口油，欢呼，喝彩 The people cheered the football team.cheerful adj. cheerfully adv cheerfulness n.14. now that 同since相似，语气较弱，强调人们已知的事实。1 .既然你
11、忙，就让我给你做吧。Now that you are busy, let me do it for you.2 .既然人都齐了，咱们开始干吧。 Now that everyone is here let s start work辨析：now that既然，由于，是连词词组，引导原因状语从句，表示明显的原因或即成的事实。口语中that常可省略。其他引导原因状语从句的连接词；because因为（语气较重，常用于回答 why的提问）since因为，既然，由于（可与now that 互换）as因为（语气较弱）for因为（并列连词，引导一个分句，不能置于句首，表示进一步补充说明）15. break ou
12、t 它与happen, take place, come out等词的用法一样，是不及物动词，不能带宾语，不能用于被动语态。1）战争爆发The American Civil War broke out in 1861.美国内战爆发于 1861 年。2）发生争吵A quarrel broke out between them.他们之间发生了 争吵。3）（火灾）发生 A fire broke out in his house last night.昨晚他家里失火了。考点break out通常指战争、疾病、灾害等的爆发。不及物动词短语，不能用于被动语态。与break 相关的短语 :break dow
13、n（机器）出故障，损坏；分解，起化学变化；破坏；拆散break in破门而入；打断break away from脱离；打破陈规break through突围；突破；冲垮；克服break up打碎；拆散；分裂；分解break ones word/promise食言；说话不算数16. watch out 注意，留神，小心Watch out! There is a car coming!X look out 小心，注意Look out! The road is full of holes.拓展： watch for sb/sth观察等待那只猫在墙上伺机捕捉鸟儿。The cat was on the wall,watching for birds. Watch over 照管；监督；保护