现代大学英语第三册UnitSilentSpring省公共课一等奖全国赛课获奖课件.pptx

Silent Spring Rachel CarsonUnit 5第1页Work in pairs to name environmental problems that are threatening our world.第2页sand stormdesertificationsoil erosiondeforestationsalinization第3页Environmental ProblemsEnvironmental ProblemsAir-related environmental problemsGreenhouse effectOzone depletionAir pollutionwater-related environmental problemsAcid rainWastewaterWater crisisMarine pollution and acidification第4页 Land-related environmental problemsProblems arising from inefficient land use(urban sprawl,habitat fragmentation,habitat destruction)Problems arising from land pollution and degradation(desertification,land pollution,soil pollution)Other environmental problemsThe use of pesticides Inefficient use of resources and energy crisisNon-recyclable waste(plastic and electronic waste)Genetic engineering(genetically modified foods)Nuclear development第5页1.We are faced with all kinds of environmental problems nowadays.But what is the one that Rachel Carson dealt with in her book Silent Spring?2.Does Carson mean that insecticides should never be used in agriculture?3.How do you see the environmental problems in your city?How should our government do?and how should we citizens of this city do?Preview Questions第6页1.Content&Message:fill in the gap in our knowledge of the environment of degradation between Carsons time and the present day develop an environmental consciousness2.Language:new words and expressions practice reading skills understanding complicated paragraphs reading for gist inferring the authors attitudes/feelings/opinions/conclusions drawing inferences Objectives第7页She had an intense love for nature since her childhood:“Humans have now acquired a fateful power to alter and to destroy nature.But Man is a part of nature,and his war against nature is inevitably a war against himself.”Rachel Carson Author BackgroundPublications:Under the Sea-Wind 海风下海风下The Sea Around Us 周遭之海周遭之海The Edge of the Sea在海之滨在海之滨Silent Spring 寂静春天寂静春天第8页She was once bitterly attacked:“an anti-humanitarian crank,a priestess of nature,and a hysterical woman”But she courageously went on fighting until her idea caught on and more and more people joined in.the mother of modern environmental movement AuthorBackground第9页The$300,000,000 pesticides industry has been highly irritated by a quiet woman author whose previous works on science have been praised for the beauty and precision of the writing.In her latest work,however,Miss Carson is not so gentle.More pointed than poetic,she argues that the widespread use of pesticides is dangerously tilting the so-called balance of nature.Pesticides poison not only pests,she says,but also humans,wildlife,the soil,food and water.NY Times 15apr64Report on Silent Spring(1962)第10页1.How was it received?2.How significant is it?3.Does it still make sense now?第11页About the bookAbout the bookvWhen the book first appeared,Carson was bitterly attacked by the chemical industry and some people in the government as an alarmist,but she courageously spoke out against those criticism.vThe threats she had outlinedthe contamination of the food chain,cancer,genetic damage,the deaths of entire specieswere too frightening to ignore.vFor the first time,the need to regulate industry in order to protect the environment became widely accepted,and environmentalism was born.第12页DetailedAnalysisStructureText AnalysisSilent SpringUnit 5 Theme 第13页I.Structure of the TextI.Structure of the TextvPart I:paras.1-6va town before&after the disastervPart II:paras.7-9vcause of the disaster:chemicalsvPart III:paras.10-14vcharacter&impact of mans tampering with naturevPart IV:paras.15-18vreasons why pesticides fail to solve the pest problemvPart V:paras.19-24vcause of modern pest problem and possible solutions vPart VI:para.25第14页Part one(1-6):DiscussionPart one(1-6):DiscussionvHow did the town look like before and after it was polluted?vIn paragraph 3,it mentioned that some evil spell settled on the community,which made the lives in this city lose its vigor.Is it the truth?If not,what made it?第15页II.Detailed Discussion of the Textv1.There was once a town in the heart of America where all life seemed to live in harmony with its surroundings.(-1)vheart:the central or most important part vin harmony with:in a state of peaceful co-existence and agreementvParaphrase:Once upon a time there was a town in the central part of America where all living things seemed to co-exist peacefully with their environment.第16页E.g:racial harmonydomestic harmony Everyone lives in harmony with each other.Tourism should develop in harmony with environment.We are living in a harmonious society.harmony:n harmonious adj live in harmony with 与友好相处 17第17页v2.The town lay in the midst of prosperous farms,where,in spring,white clouds of bloom drifted above the green fields.(-1)In the midst of:a.在当中（表方位在当中（表方位)b.正当某事发生时候（表时间）正当某事发生时候（表时间）white clouds of bloom:flowers are like white clouds prosperous:booming;promising;(of plants)growing wellThe town lay among booming(or well growing)farms.In spring,flowers floated above the green fields just like clouds.第18页vset up:to cause,produce,raise:a wallva blaze of color:an impressive and noticeable show of colors 色彩斑斓色彩斑斓vPara:In autumn,the oak,maple and birch trees turned yellow,red or brown,thus making a beautiful show of colors against the dark green of pine trees.vPay attention to Carsons use of color in describing the town before its environment was contaminated3.In autumn,oak and maple and birch set up a blaze of color that flamed and flickered across.第19页flicker v./n.a.to move with small quick movements 摇曳 b.(of a light or a flame)to keep going on and off as it shines or burns 忽明忽暗 e.g:shadows flickering on the wall leaves flickering in the wind The candle flickered in the wind.A smile flickered across his face.flame:a.burn with a brighter flame b.glow or shine like(the colour of)flames e.g.The autumn woods flamed with color.第20页4.The countryside was,in fact,famous for the 4.The countryside was,in fact,famous for the abundance and varietyabundance and varietyvabundance:n a large quantity of sth China has an abundance of natural resource.vIn abundance 大量，充分大量，充分vAbundant adj This area is abundant in petroleum deposit.vabound V The stream abounds with fish.vMigrant:n(1)候鸟，迁徙动物候鸟，迁徙动物 （2）移民，移居）移民，移居者者vImmigrants/migrate/migration第21页v-Then,as if by some evil power,disaster fell on the community:Strange diseases quickly struck down large numbers of chicken;the cattle and sheep became ill and died.vSpell:words that make magical things happenvNote the use of unit words in English:a flock of chicken/sheep/tourists;a herd of cattle/elephants5.Then some evil spell settled on the community:mysterious diseases swept the flocks of chickens;the cattle and sheep sickened and died.第22页v-No birds came to feed on what was there at the feeding stations.vDeserted:forsaken;visited by nobody(here birds)vA street/island6.The feeding stations in the backyards were deserted.(-4)第23页7.On the mornings that had once throbbed with the dawn chorus of scores of bird voices there was now no sound;(-4)v-The morning air used to vibrate with the singing of birds,but there was now no sound.vThrob:v(1)(of a part of the body)to feel a series of regular painful movements 抽动，抽筋；抽动，抽筋；（2）to beat or sound with a strong,regular rhythm 跳动，搏动；跳动，搏动；(3)(of a place)to have a lot of life,energy地方充满了活力地方充满了活力 vOur campus is throbbing with life.第24页Contrast:a town before&after the disasterContrast:a town before&after the disaster Before vColor:a blaze of colorvSound:bark,birds singingvMotion:vibrant,throbbing with lifevOverall impression:vibrant,harmonious beautiful AfterColor:browned and withered vegetationSound:still,quite Motion:lifelessOverall impression:lifeless deserted,awfulDetailed Analysis第25页1.Why did the author paint such a beautiful picture of a non-existent town?2.What was she trying to appeal to?Detailed AnalysisPart II:Discussion(7-9)第26页 Nature vDirection:environment lifevSpeed:adaptative Human Direction:life environmentSpeed:destructive irrecoverable1.How has man changed the relation between organisms and their surroundings?Text AnalysisDetailed AnalysisPart III:Discussion(10-14)第27页2.In what way has mans power changed in character？(para.11)3.How do chemicals affect our life?(para.11)“passing from one to another in a chain of poisoning and death”4.What are the two examples given by the author as mans tampering with nature?(paras.11-13)5.Why is mans change of the world particularly devastating?(paras.12-14)Part III:Discussion Text AnalysisDetailed Analysis第28页9.To a large extent,9.To a large extent,the physical form and the habits the physical form and the habits ofbeen ofbeen molded bymolded by the environment(-10).the environment(-10).vTo a large extent：在很大程度上：在很大程度上vTo some extent/degree;to a certain extent/degreevMold:v to strongly influence the way sbs character,attitude and etc 对对影响重大，塑造成影响重大，塑造成vParents are responsible for molding childrens physical and psychological health.第29页10.Considering the whole span of earthly time,the opposite effect,in which life actually modifies its surroundings,has been relatively slight.(-10)v-When we think of the long history of life on earth,the degree(or extent)that living things affect their environment has been insignificant as compared with the effect of the environment on plant and animal life.第30页11.but it has changed 11.but it has changed in characterin character.(-11).(-11)vbut the nature of this power to alter the environment has changed.vIn the past,to survive humans made use of what nature offered,for example,by cutting down trees,damming rivers;now they create things that did not exist,such as chemicals and unnatural radiation.第31页vAssault:v./n the act of attacking some place in order to control itvOn the early morning of Dec 7th,1941,Japanese navy launched an assault on Pearl Harbor.vContamination:the state of being pollutedvContaminate v 污染污染 contaminant n 污染物污染物vLethal:causing or able to cause death(deadly,fatal)vA lethal nuclear weapon第32页12.This pollution is for the most part irrecoverable.(-11)v-In most cases,the polluted air,soil,and rivers and the sea cannot be restored to their original natural state.vIrrecoverable:sth you cannot get back无法挽回无法挽回virreparable(not reparable);incurable;irremediable第33页13.Chemicals sprayed on croplands or forests or gardens lie long in soil,entering into living organisms,passing from one to another in a chain of poisoning and death.(-11)vlie long in soil:they stay in soil for a long time because they dont break down chemically thereventering into living organisms,passing from one to another in a chain of poisoning and death:vthe chemicals that insecticides contain are likely to enter birds and animals in food,and then pass out in waste matter from their bodies,get into the soil and are absorbed by the plants that grow on it.When birds and animals and people eat the plants,these substances again are taken into their bodies.This process goes on and on endlessly,poisoning plant and animal life alike.In short,the chemicals tend to be endlessly recycled in the food chains.第34页14.Given time-time not in years but in millennia-life adjusts,and a balance has been reached.(-12)v-When the environment changes,living things can adapt to their new surroundings,but it is a long process and it takes millennia of years for life to be in harmony with their modified world again.vmillennia of years:thousands of years 第35页v15.But in the modern world there is no time.(-12)v-But in the modern world,life has no time to adjust itself to the change of environment,for mans power to temper with nature has become too great.(Man is so eager to change nature for short-term benefits,he does not think of the long-term interest of his own species.)第36页v16.The rapidity of change follows the impetuous pace of man rather than the deliberate pace of nature.(-13)vThe environment no longer changes slowly according to the laws of nature.Rather,it is rapidly changed by shortsighted,profit-seeking mankind.vTherefore adjustment can never keep up with change,and a new balance between living things and their environment can hardly be reached.第37页1.Impetuous:(impulsive)(1)characterized by undue haste and lack of thought or deliberation;(2)marked by violent force;Youngsters are usually more impetuous than old people.Dont make impetuous promises.2.deliberate:adj(1)done on purpose(2)done slowly and carefully v.to think carefully deliberate on/upon 仔细研究，考虑The old man spoke in a slow and deliberate way.He deliberated on whether to buy the villa.Cf:deliberate/reflect/meditate/ponder第38页v17.Radiation is now the unnatural creation of mans tampering with the atom.(-13)vTamper with:to meddle or interfere with 任意破坏，任意破坏，损害，篡改，瞎搞损害，篡改，瞎搞v.The machine will self-destruct if you tamper with it.v.Please do not tamper with my feelings.In the past,radiation was only sent out from radioactive substances in certain rock;today man creates such harmful rays by splitting the nucleus of the atom of such substance as radium.第39页v18.The chemicals are the synthetic creations of mans inventive mind,having no counterparts in nature.(-13)v-Nature does not produce such things as chemicals.They are man-made,i.e.the result of mans creative power.vSynthetic:artificial第40页1.Why are pesticides not a good solution?(3 reasons)They kill indiscriminately,reducing biodiversity.(para.16)vThey contaminate the entire environment.(para.16)residual effectvThey couldnt solve the pest problem.(para.17)resistance to chemicalsresurgence induced by pesticidesText AnalysisDetailed AnalysisPart IV:Discussion(15-18)第41页2.What does the“endless spiral”refer to?(para.17)3.What does the author mean by saying“all life is caught up in its violent crossfire”?(para.17)4.What is the authors attitude towards mans use of chemicals?How is it implied?Rhetorical questions:“Can anyone believe it is?”(para.16)“How could intelligent beings?”(para.18)Text AnalysisDetailed AnalysisPart IV:Discussion 第42页v19.These chemicals are now applied almost universally to farms,gardens,forests,and homes(-16)vapply sth to:v（1）应用于，实践于；适合，符合）应用于，实践于；适合，符合v（2）涂抹，擦上）涂抹，擦上v（3）apply oneself to 专心于，投身于专心于，投身于v（4）apply for 寻求工作，职位寻求工作，职位e.g:We should apply what we have learned to practice.She never goes out without applying sun cream to/on her face and neck.My son is applying himself to the new toy truck.Im writing to apply for a position of a manager.Words:application,applicant第43页v20.to still the song of birds and the leaping of fish,to coat the leaves with a deadly film,and to linger on in soil(-16)v to kill the birds and fish,to cover the leaves with a thin layer of death-causing chemicals and stay in soil for a long timevLinger on:v(1)stay or remain for a long time(1)继续残留继续残留（2）留恋往）留恋往返，意犹未尽返，意犹未尽（3）苟延残喘）苟延残喘vThough I am back from Paris,yet my memories linger on.vThe delicious taste can linger on the plate a long time.vThough desperately ill he could linger on for months 第44页v21.The whole process of spraying se