雅思范文朗读背诵34篇

雅思范文背诵篇(01)RaisingOystersIntheoysterswereraisedinmuchthesamewayasdirtfarmersraisedtomatoes-bytransplantingthem.First,farmersselectedtheoysterbed,clearedthebottomofoldshellsandotherdebris,thenscatteredcleanshellsabout.Next,they"planted”fertilizedoystereggs,whichwithintwoorthreeweekshatchedintolarvae.Thelarvaedrifteduntiltheyattachedthemselvestothecleanshellsonthebottom.Theretheyremainedandintimegrewintobabyoysterscalledseedorspat.Thespatgrewlargerbydrawinginseawaterfromwhichtheyderivedmicroscopicparticlesoffood.Beforelong,farmersgatheredthebabyoysters,transplantedthemoncemoreintoanotherbodyofwatertofattenthemup.Untilrecentlythesupplyofwildoystersandthosecrudelyfarmedweremorethanenoughtosatisfypeople'sneeds.Buttodaythedelectableseafoodisnolongeravailableinabundance.Theproblemhasbecomesoseriousthatsomeoysterbedshavevanishedentirely.Fortunately,asfarbackastheearly1900'smarinebiologistsrealizedthatifnewmeasureswerenottaken,oysterswouldbecomeextinctoratbestaluxuryfood.Sotheysetupwell-equippedhatcheriesandwenttowork.Buttheydidnothavetheproperequipmentortheskilltohandletheeggs.Theydidnotknowwhen,what,andhowtofeedthelarvae.Andtheyknewlittleaboutthepredatorsthatattackandeatbabyoystersbythemillions.Theyfailed,buttheydoggedlykeptatit.Finally,inthe1940'sasignificantbreakthroughwasmade.Themarinebiologistsdiscoveredthatbyraisingthetemperatureofthewater,theycouldinduceoysterstospawnnotonlyinthesummerbutalsointhefall,winter,andspring.Latertheydevelopedatechniqueforfeedingthelarvaeandrearingthemtospat.Goingstillfurther,theysucceededinbreedingnewstrainsthatwereresistanttodiseases,grewfasterandlarger,andflourishedinwaterofdifferentsalinitiesandtemperatures.Inaddition,thecultivatedoysterstastedbetter!雅思范文背诵篇（02）PlanktonScatteredthroughtheseasoftheworldarebillionsoftonsofsmallplantsandanimalscalledplankton.Mostoftheseplantsandanimalsaretoosmallforthehumaneyetosee.Theydriftaboutlazilywiththecurrents,providingabasicfoodformanylargeranimals.Planktonhasbeendescribedastheequivalentofthegrassesthatgrowonthedrylandcontinents,andthecomparisonisanappropriateone.Inpotentialfoodvalue,however,planktonfaroutweighsthatofthelandgrasses.Onescientisthasestimatedthatwhilegrassesoftheworldproduceabout49billiontonsofvaluablecarbohydrateseachyear,thesea'splanktongeneratesmorethantwiceasmuch.Despiteitsenormousfoodpotential,littleeffectwasmadeuntilrecentlytofarmplanktonaswefarmgrassesonland.Nowmarinescientistshaveatlastbeguntostudythispossibility,especiallyasthesea'sresourcesloomevenmoreimportantasameansoffeedinganexpandingworldpopulation.Nooneyethasseriouslysuggestedthat“plankton-burgers”maysoonbecomepopulararoundtheworld.Asapossiblefarmedsupplementaryfoodsource,however,planktonisgainingconsiderableinterestamongmarinescientists.Onetypeofplanktonthatseemstohavegreatharvestpossibilitiesisatinyshrimp-likecreaturecalledkrill.Growingtotwoorthreeincheslong,krillprovidesthemajorfoodforthegreatbluewhale,thelargestanimaltoeverinhabittheEarth.Realizingthatthiswhalemaygrowto100feetandweigh150tonsatmaturity,itisnotsurprisingthateachone.雅思范文背诵篇（03）BotanyBotany,thestudyofplants,occupiesapeculiarpositioninthehistoryofhumanknowledge.Formanythousandsofyearsitwastheonefieldofawarenessaboutwhichhumanshadanythingmorethanthevaguestofinsights.ItisimpossibletoknowtodayjustwhatourStoneAgeancestorsknewaboutplants,butformwhatwecanobserveofpre-industrialsocietiesthatstillexistadetailedlearningofplantsandtheirpropertiesmustbeextremelyancient.Thisislogical.Plantsarethebasisofthefoodpyramidforalllivingthingsevenforotherplants.Theyhavealwaysbeenenormouslyimportanttothewelfareofpeoplenotonlyforfood,butalsoforclothing,weapons,tools,dyes,medicines,shelter,andagreatmanyotherpurposes.TribeslivingtodayinthejunglesoftheAmazonrecognizeliterallyhundredsofplantsandknowmanypropertiesofeach.Tothem,botany,assuch,hasnonameandisprobablynotevenrecognizedasaspecialbranchof“knowledge”atall.Unfortunately,themoreindustrializedwebecomethefartherawaywemovefromdirectcontactwithplants,andthelessdistinctourknowledgeofbotanygrows.Yeteveryonecomesunconsciouslyonanamazingamountofbotanicalknowledge,andfewpeoplewillfailtorecognizearose,anapple,oranorchid.WhenourNeolithicancestors,livingintheMiddleEastabout10,000yearsago,discoveredthatcertaingrassescouldbeharvestedandtheirseedsplantedforricheryieldsthenextseasonthefirstgreatstepinanewassociationofplantsandhumanswastaken.Grainswerediscoveredandfromthemflowedthemarvelofagriculture:cultivatedcrops.Fromthenon,humanswouldincreasinglytaketheirlivingfromthecontrolledproductionofafewplants,ratherthangettingalittlehereandalittletherefrommanyvarietiesthatgrewwild-andtheaccumulatedknowledgeoftensofthousandsofyearsofexperienceandintimacywithplantsinthewildwouldbegintofadeaway.雅思范文背诵篇（04）BritishColumbiaBritishColumbiaisthethirdlargestCanadianprovinces,bothinareaandpopulation.Itisnearly1.5timesaslargeasTexas,andextends800miles(1,280km)northfromtheUnitedStatesborder.ItincludesCanada'sentirewestcoastandtheislandsjustoffthecoast.MostofBritishColumbiaismountainous,withlongruggedrangesrunningnorthandsouth.Eventhecoastalislandsaretheremainsofamountainrangethatexistedthousandsofyearsago.DuringthelastIceAge,thisrangewasscouredbyglaciersuntilmostofitwasbeneaththesea.Itspeaksnowshowasislandsscatteredalongthecoast.Thesouthwesterncoastalregionhasahumidmildmarineclimate.SeawindsthatblowinlandfromthewestarewarmedbyacurrentofwarmwaterthatflowsthroughthePacificOcean.Asaresult,wintertemperaturesaverageabovefreezingandsummersaremild.Thesewarmwesternwindsalsocarrymoisturefromtheocean.Inlandfromthecoast,thewindsfromthePacificmeetthemountainbarriersofthecoastalrangesandtheRockyMountains.Astheyrisetocrossthemountains,thewindsarecooled,andtheirmoisturebeginstofallasrain.Onsomeofthewesternslopesalmost200inches(500cm)ofrainfalleachyear.MorethanhalfofBritishColumbiaisheavilyforested.Onmountainslopesthatreceiveplentifulrainfall,hugeDouglasfirsriseintoweringcolumns.Theseforestgiantsoftengrowtobeasmuchas300feet(90m)tall,withdiametersupto10feet(3m).MorelumberisproducedfromthesetreesthanfromanyotherkindoftreeinNorthAmerica.Hemlock,redcedar,andbalsamfirareamongtheothertreesfoundinBritishColumbia.雅思范文背诵篇(05)TheoriginofRefrigeratorsBythemid-nineteenthcentury,theterm“icebox”hadenteredtheAmericanlanguage,buticewasstillonlybeginningtoaffectthedietofordinarycitizensintheUnitedStates.Theicetradegrewwiththegrowthofcities.Icewasusedinhotels,taverns,andhospitals,andbysomeforward-lookingcitydealersinfreshmeat,freshfish,andbutter.AftertheCivilWar(1861-1865),asicewasusedtorefrigeratefreightcars,italsocameintohouseholduse.Evenbefore1880,halfoftheicesoldinNewYork,Philadelphia,andBaltimore,andone-thirdofthatsoldinBostonandChicago,wenttofamiliesfortheirownuse.Thishadbecomepossiblebecauseanewhouseholdconvenience,theicebox,aprecursorofthemodernrefrigerator,hadbeeninvented.Makinganefficienticeboxwasnotaseasyaswemightnowsuppose.Intheearlynineteenthcentury,theknowledgeofthephysicsofheat,whichwasessentialtoascienceofrefrigeration,wasrudimentary.Thecommonsensenotionthatthebesticeboxwasonethatpreventedtheicefrommeltingwasofcoursemistaken,foritwasthemeltingoftheicethatperformedthecooling.Nevertheless,earlyeffortstoeconomizeiceincludedwrappinguptheiceinblankets,whichkepttheicefromdoingitsjob.Notuntilneartheendofthenineteenthcenturydidinventorsachievethedelicatebalanceofinsulationandcirculationneededforanefficienticebox.Butasearlyas1803,andingeniousMarylandfarmer,ThomasMoore,hadbeenontherighttrack.HeownedafarmabouttwentymilesoutsidethecityofWashington,forwhichthevillageofGeorgetownwasthemarketcenter.Whenheusedaniceboxofhisowndesigntotransporthisbuttertomarket,hefoundthatcustomerswouldpassuptherapidlymeltingstuffinthetubsofhiscompetitorstopayapremiumpriceforhisbutter,stillfreshandhardinneat,one-poundbricks.Oneadvantageofhisicebox,Mooreexplained,wasthatfarmerswouldnolongerhavetotraveltomarketatnightinordertokeeptheirproducecool.雅思范文背诵篇（06）TelecommutingTelecommuting--substitutingthecomputerforthetriptothejob----hasbeenhailedasasolutiontoallkindsofproblemsrelatedtoofficework.Forworkersitpromisesfreedomfromtheoffice,lesstimewastedintraffic,andhelpwithchild-careconflicts.Formanagement,telecommutinghelpskeephighperformersonboard,minimizestardinessandabsenteeismbyeliminatingcommutes,allowsperiodsofsolitudeforhigh-concentrationtasks,andprovidesschedulingflexibility.Insomeareas,suchasSouthernCaliforniaandSeattle,Washington,localgovernmentsareencouragingcompaniestostarttelecommutingprogramsinordertoreducerush-hourcongestionandimproveairquality.Butthesebenefitsdonotcomeeasily.Makingatelecommutingprogramworkrequirescarefulplanningandanunderstandingofthedifferencesbetweentelecommutingrealitiesandpopularimages.Manyworkersareseducedbyrosyillusionsoflifeasatelecommuter.AcomputerprogrammerfromNewYorkCitymovestothetranquilAdirondackMountainsandstaysincontactwithherofficeviacomputer.Amanagercomesintohisofficethreedaysaweekandworksathometheothertwo.Anaccountantstayshometocareforhersickchild;shehooksuphertelephonemodernconnectionsanddoesofficeworkbetweencallstothedoctor.Thesearepowerfulimages,buttheyarealimitedreflectionofreality.Telecommutingworkerssoonlearnthatitisalmostimpossibletoconcentrateonworkandcareforayoungchildatthesametime.Beforeacertainage,youngchildrencannotrecognize,muchlessrespect,thenecessaryboundariesbetweenworkandfamily.Additionalchildsupportisnecessaryiftheparentistogetanyworkdone.Managementtoomustseparatethemythfromthereality.Althoughthemediahaspaidagreatdealofattentiontotelecommutinginmostcasesitistheemployee'ssituation,nottheavailabilityoftechnologythatprecipitatesatelecommutingarrangement.Thatispartlywhy,despitethewidespreadpresscoverage,thenumberofcompanieswithwork-at-homeprogramsorpolicyguidelinesremainssmall.雅思范文背诵篇(07)ChangingRolesofPublicEducationOneofthemostimportantsocialdevelopmentsthathelpedtomakepossibleashiftinthinkingabouttheroleofpubliceducationwastheeffectofthebabyboomofthe1950'sand1960'sontheschools.Inthe1920's,butespeciallyintheDepressionconditionsofthe1930's,theUnitedStatesexperiencedadecliningbirthrate---everythousandwomenagedfifteentoforty-fourgavebirthtoabout118livechildrenin1920,89.2in1930,75.8in1936,and80in1940.WiththegrowingprosperitybroughtonbytheSecondWorldWarandtheeconomicboomthatfollowedityoungpeoplemarriedandestablishedhouseholdsearlierandbegantoraiselargerfamiliesthanhadtheirpredecessorsduringtheDepression.Birthratesroseto102perthousandin1946,106.2in1950,and118in1955.Althougheconomicswasprobablythemostimportantdeterminant,itisnottheonlyexplanationforthebabyboom.Theincreasedvalueplacedontheideaofthefamilyalsohelpstoexplainthisriseinbirthrates.Thebabyboomersbeganstreamingintothefirstgradebythemid1940'sandbecameafloodby1950.Thepublicschoolsystemsuddenlyfounditselfovertaxed.Whilethenumberofschoolchildrenrosebecauseofwartimeandpostwarconditions,thesesameconditionsmadetheschoolsevenlesspreparedtocopewiththefood.Thewartimeeconomymeantthatfewnewschoolswerebuiltbetween1940and1945.Moreover,duringthewarandintheboomtimesthatfollowed,largenumbersofteacherslefttheirprofessionforbetter-payingjobselsewhereintheeconomy.Thereforeinthe1950'sand1960's,thebabyboomhitanantiquatedandinadequateschoolsystem.Consequently,the“custodialrhetoric"ofthe1930'sandearly1940'snolongermadesensethatis,keepingyouthsagedsixteenandolderoutofthelabormarketbykeepingtheminschoolcouldnolongerbeahighpriorityforaninstitutionunabletofindspaceandstafftoteachyoungerchildrenagedfivetosixteen.Withthebabyboom,thefocusofeducatorsandoflaymeninterestedineducationinevitablyturnedtowardthelowergradesandbacktobasicacademicskillsanddiscipline.Thesystemnolongerhadmuchinterestinofferingnontraditional,new,andextraservicestoolderyouths.雅思范文背诵篇(08)ScientificTheoriesInscience,atheoryisareasonableexplanationofobservedeventsthatarerelated.Atheoryofteninvolvesanimaginarymodelthathelpsscientistspicturethewayanobservedeventcouldbeproduced.Agoodexampleofthisisfoundinthekineticmoleculartheory,inwhichgasesarepicturedasbeingmadeupofmanysmallparticlesthatareinconstantmotion.Ausefultheory,inadditiontoexplainingpastobservations,helpstopredicteventsthathavenotasyetbeenobserved.Afteratheoryhasbeenpublicized,scientistsdesignexperimentstotestthetheory.Ifobservationsconfirmthescientist'spredictions,thetheoryissupported.Ifobservationsdonotconfirmthepredictions,thescientistsmustsearchfurther.Theremaybeafaultintheexperiment,orthetheorymayhavetoberevisedorrejected.Scienceinvolvesimaginationandcreativethinkingaswellascollectinginformationandperformingexperiments.Factsbythemselvesarenotscience.AsthemathematicianJulesHenriPoincaresaid,“Scienceisbuiltwithfactsjustasahouseisbuiltwithbricks,butacollectionoffactscannotbecalledscienceanymorethanapileofbrickscanbecalledahouse.”Mostscientistsstartaninvestigationbyfindingoutwhatotherscientistshavelearnedaboutaparticularproblem.Afterknownfactshavebeengathered,thescientistcomestothepartoftheinvestigationthatrequiresconsiderableimagination.Possiblesolutionstotheproblemareformulated.Thesepossiblesolutionsarecalledhypotheses.Inaway,anyhypothesisisaleapintotheunknown.Itextendsthescientist'sthinkingbeyondtheknownfacts.Thescientistplansexperiments,performscalculations,andmakesobservationstotesthypotheses.Withouthypothesis,furtherinvestigationlackspurposeanddirection.Whenhypothesesareconfirmed,theyareincorporatedintotheories.雅思范文背诵篇（09）InternationalBusinessandCross-culturalCommunicationTheincreaseininternationalbusinessandinforeigninvestmenthascreatedaneedforexecutiveswithknowledgeofforeignlanguagesandskillsincross-culturalcommunication.Americans,however,havenotbeenwelltrainedineitherareaand,consequently,havenotenjoyedthesamelevelofsuccessinnegotiationinaninternationalarenaashavetheirforeigncounterparts.Negotiatingistheprocessofcommunicatingbackandforthforthepurposeofreachinganagreement.Itinvolvespersuasionandcompromise,butinordertoparticipateineitherone,thenegotiatorsmustunderstandthewaysinwhichpeoplearepersuadedandhowcompromiseisreachedwithinthecultureofthenegotiation.Inmanyinternationalbusinessnegotiationsabroad,Americansareperceivedaswealthyandimpersonal.ItoftenappearstotheforeignnegotiatorthattheAmericanrepresentsalargemulti-million-dollarcorporationthatcanaffordtopaythepricewithoutbargainingfurther.TheAmericannegotiator'srolebecomesthatofanimpersonalpurveyorofinformationandcash.InstudiesofAmericannegotiatorsabroad,severaltraitshavebeenidentifiedthatmayservetoconfirmthisstereotypicalperception,whileunderminingthenegotiator'sposition.Twotraitsinparticularthatcausecross-culturalmisunderstandingaredirectnessandimpatienceonthepartoftheAmericannegotiator.Furthermore,Americannegotiatorsofteninsistonrealizingshort-termgoals.Foreignnegotiators,ontheotherhand,mayvaluetherelationshipestablishedbetweennegotiatorsandmaybewillingtoinvesttimeinitforlong-termbenefits.Inordertosolidifytherelationship,theymayoptforindirectinteractionswithoutregardforthetimeinvolvedingettingtoknowtheothernegotiator.雅思范文背诵篇(10)MovieMusicAccustomedthoughwearetospeakingofthefilmsmadebefore1927as“silent”，thefilmhasneverbeen,inthefullsenseoftheword,silent.Fromtheverybeginning,musicwasregardedasanindispensableaccompaniment;whentheLumierefilmswereshownatthefirstpublicfilmexhibitionintheUnitedStatesinFebruary1896,theywereaccompaniedbypianoimprovisationsonpopulartunes.Atfirst,themusicplayedborenospecialrelationshiptothefilms;anaccompanimentofanykindwassufficient.Withinaveryshorttime,however,theincongruityofplayinglivelymusictoasolemnfilmbecameapparent,andfilmpianistsbegantotakesomecareinmatchingtheirpiecestothemoodofthefilm.Asmovietheatersgrewinnumberandimportance,aviolinist,andperhapsacellist,wouldbeaddedtothepianistincertaincases,andinthelargermovietheaterssmallorchestraswereformed.Foranumberofyearstheselectionofmusicforeachfilmprogramrestedentirelyinthehandsoftheconductororleaderoftheorchestra,andveryoftentheprincipalqualificationforholdingsuchapositionwasnotskillortastesomuchastheownershipofalargepersonallibraryofmusicalpieces.Sincetheconductorseldomsawthefilmsuntilthenightbeforetheyweretobeshown(ifindeed,theconductorwasluckyenoughtoseethemthen),themusicalarrangementwasnormallyimprovisedinthegreatesthurry.Tohelpmeetthisdifficulty,filmdistributingcompaniesstartedthepracticeofpublishingsuggestionsformusicalaccompaniments.In1909,forexample,theEdisonCompanybeganissuingwiththeirfilmssuchindicationsofmoodas“pleasant”，“sad”，“lively”.Thesuggestionsbecamemoreexplicit,andsoemergedthemusicalcuesheetcontainingindicationsofmood,thetitlesofsuitablepiecesofmusic,andprecisedirectionstoshowwhereonepieceledintothenext.Certainfilmshadmusicespeciallycomposedforthem.ThemostfamousoftheseearlyspecialscoreswasthatcomposedandarrangedforD.WGriffith'sfilmBirthofaNation,whichwasreleasedin1915.雅思范文背诵篇(11)PianoTheancestryofthepianocanbetracedtotheearlykeyboardinstrumentsofthefifteenthandsixteenthcenturies---thespinet,thedulcimer,andthevirginal.Intheseventeenthcenturytheorgan,theclavichord,andtheharpsichordbecamethechiefinstrumentsofthekeyboardgroup,asupremacytheymaintaineduntilthepianosupplantedthemattheendoftheeighteenthcentury.Theclavichord'stonewasmetallicandneverpowerful;nevertheless,becauseofthevarietyoftonepossibletoit,manycomposersfoundtheclavichordasympatheticinstrumentforintimatechambermusic.Theharpsichordwithitsbright,vigoroustonewasthefavoriteinstrumentforsupportingthebassofthesmallorchestraoftheperiodandforconcertuse,butthecharacterofthetonecouldnotbevariedsavebymechanicalorstructuraldevices.ThepianowasperfectedintheearlyeighteenthcenturybyaharpsichordmakerinItaly(thoughmusicologistspointoutseveralpreviousinstancesoftheinstrument).Thisinstrumentwascalledapianoeforte(sortandloud),toindicateitsdynamicversatility;itsstringswerestruckbyarecoilinghammerwithafelt-paddedhead.Thewiresweremuchheavierintheearlierinstruments.Aseriesofmechanicalimprovementscontinuingwellintothenineteenthcentury,includingtheintroductionofpedalstosustaintoneortosoftenit,theperfectionofametalframe,andsteelwireofthefinestquality,finallyproducedaninstrumentcapableofmyriadtonaleffectsfromthemostdelicateharmoniestoanalmostorchestralfullnessofsound,fromaliquid,singingtonetoasharp,percussivebrilliance.雅思范文背诵篇(12)FordAlthoughHenryFord'snameiscloselyassociatedwiththeconceptofmassproduction,heshouldreceiveequalcreditforintroducinglaborpracticesasearlyas1913thatwouldbeconsideredadvancedevenbytoday'sstandards.Safetymeasureswereimproved,andtheworkdaywasreducedtoeighthours,comparedwiththeten-ortwelve-hourdaycommonatthetime.Inordertoaccommodatetheshorterworkday,theentirefactorywasconvertedfromtwotothreeshifts.Inaddition,sickleavesaswellasimprovedmedicalcareforthoseinjuredonthejobwereinstituted.TheFordMotorCompanywasoneofthefirstfactoriestodevelopatechnicalschooltotrainspecializedskilledlaborersandanEnglishlanguageschoolforimmigrants.Someeffortswereevenmadetohirethehandicappedandprovidejobsforformerconvicts.Themostwidelyacclaimedinnovationwasthefive-dollar-a-dayminimumwagethatwasofferedinordertorecruitandretainthebestmechanicsandtodiscouragethegrowthoflaborunions.Fordexplainedthenewwagepolicyintermsofefficiencyandprofitsharing.Healsomentionedthefactthathisemployeeswouldbeabletopurchasetheautomobilesthattheyproduced-ineffectcreatingamarketfortheproduct.Inordertoqualifyfortheminimumwage,anemployeehadtoestablishadecenthomeanddemonstrategoodpersonalhabits,includingsobriety,thriftiness,industriousness,anddependability.AlthoughsomecriticismwasdirectedatFordforinvolvinghimselftoomuchinthepersonallivesofhisemployees,therecanbenodoubtthat,atatimewhenimmigrantswerebeingtakenadvantageofinfrightfulways,HenryFordwashelpingmanypeopletoestablishthemselvesinAmerica.雅思范文背诵篇（13）CollectiblesCollectibleshavebeenapartofalmosteveryculturesinceancienttimes.Whereassomeobjectshavebeencollectedfortheirusefulness,othershavebeenselectedfortheiraestheticbeautyalone.IntheUnitedStates,thekindsofcollectiblescurrentlypopularrangefromtraditionalobjectssuchasstamps,coins,rarebooks,andarttomorerecentitemsofinterestlikedolls,bottles,baseballcards,andcomicbooks.Interestincollectibleshasincreasedenormouslyduringthepastdecade,inpartbecausesomecollectibleshavedemonstratedtheirvalueasinvestments.Especiallyduringcyclesofhighinflation,investorstrytopurchasetangiblesthatwillatleastretaintheircurrentmarketvalues.Ingeneral,themosttraditionalcollectibleswillbesoughtbecausetheyhavepreservedtheirvalueovertheyears,thereisanorganizedauctionmarketforthem,andtheyaremosteasilysoldintheeventthatcashisneeded.Someexamplesofthemoststablecollectiblesareoldmasters,Chineseceramics,stamps,coins,rarebooks,antiquejewelry,silver,porcelain,artbywell-knownartists,autographs,andperiodfurniture.Otheritemsofmorerecentinterestincludeoldphotographrecords,oldmagazines,postcards,baseballcards,artglass,dolls,classiccars,oldbottles,andcomicbooks.Theserelativelynewkindsofcollectiblesmayactuallyappreciatefasterasshort-terminvestments,butmaynotholdtheirvalueaslong-terminvestments.Onceacollectiblehashaditsinitialplay,itappreciatesatafairlysteadyrate,supportedbyanincreasingnumberofenthusiasticcollectorscompetingforthelimitedsupplyofcollectiblesthatbecomeincreasinglymoredifficulttolocate.雅思范文背诵篇（14）TheOriginofSportsWhendidsportbegin?Ifsportis,inessence,play,theclaimmightbemadethatsportismucholderthanhumankind,for,asweallhaveobserved,thebeastsplay.Dogsandcatswrestleandplayballgames.Fishesandbirdsdance.Theapeshavesimple,pleasurablegames.Frolickinginfants,schoolchildrenplayingtag,andadultarmwrestlersaredemonstratingstrong,transgenerationalandtransspeciesbondswiththeuniverseofanimals-past,present,andfuture.Younganimals,particularly,tumble,chase,runwrestle,mock,imitate,andlaugh（orsoitseems）tothepointofdelightedexhaustion.Theirplay,andours,appearstoservenootherpurposethantogivepleasuretotheplayers,andapparently,toremoveustemporarilyfromtheanguishoflifeinearnest.Somephilosophershaveclaimedthatourplayfulnessisthemostnoblepartofourbasicnature.Intheirgenerousconceptions,playharmlesslyandexperimentallypermitsustoputourcreativeforces,fantasy,andimaginationintoaction.Playisreleasefromthetediousbattlesagainstscarcityanddeclinewhicharetheincessant,andinevitable,tragediesoflife.Thisisagrandconceptionthatexcitesandprovokes.Theholdersofthisviewclaimthattheoriginsofourhighestaccomplishments----liturgy,literature,andlaw----canbetracedtoaplayimpulsewhich,paradoxically,weseemostpurelyenjoyedbyyoungbeastsandchildren.Oursports,inthisratherhappy,nonfatalisticviewofhumannature,aremoresplendidcreationsofthenondatable,transspeciesplayimpulse.雅思范文背诵篇（15）TheHistoricalSignificanceofAmericanRevolutionThewaysofhistoryaresointricateandthemotivationsofhumanactionssocomplexthatitisalwayshazardoustoattempttorepresenteventscoveringanumberofyears,amultiplicityofpersons,anddistantlocalitiesastheexpressionofoneintellectualorsocialmovement;yetthehistoricalprocesswhichculminatedintheascentofThomasJeffersontothepresidencycanberegardedasthe