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SeThreedEffect
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deffeescalledalysis，exploresthed-effectrelatiowo（ormore）subjes.Whenyoudiscussthereassomething，youareanalyzingtheyoudiscusstheresultsproduething，youareanalyzi.Aalysisessayusuallyfoeitherthecausesortheeffectsofasituatio.hefollowingtwomodelessaysbelow，aifywhichessayfodwhichessayfoeffects.
ModelEssayOne
&ionofDinosaurs
Foralmost140millionyears，dinosaursandereptilesruledtheland，skyandsea.Dinosaurssizesaedtoeveryeroftheworld.Thenapproximately65millio，thesehugereptilesdiedoutandmammalstookovertheEarth.Fewmysterieshaveeverexcitedtheimaginatiosasmuchasthisgreatextinthatkilledoffallthedinosaurs.Overtheyears，stistshavedevelopedheoriestoexplainthecausesofthedisappearahedinosaursareptiles.ThreepossiblecausesareatheEarth'sclimate，disease，ah'swithalargeasteroid（小行星）.
&istsbelievethatthenumberofdinosaursdedeventuallydisappearedduetoatheEarth'sclimate.Duriaceous（白垩纪的）period，theclimateical.Researdicatesthatattheeaceousperiod，thetemperaturedroppedaebecamemuchcolder.Forthisreason，mahattheplaingdinosaursatedied.Thedeathoftheplantswouldyoftheplaodie，too.Astheplaingdinosaursdiedoff，sodidthemeat-eaterswhofedoheatemayhavesforthedinosaursioo.Becauseoftheirsize，manydioobigtohibernateindens（洞穴）.Theyalsolackedfurorfeathersforproteagainstthecold.Asaresult，thedinosaurswereutothenewditions.
Anotherpossiblecausefortheextinofdinosaursisdisease.Somestiststhinkthatsofdinratedadbridges，theyiedohnewillnessesatis，andweresubsequentlykilledoff.AstheCretaceousperiodwenton，moreandmorelaedtoappearoh.Becausetheupanddiowalkacrossthelaheybegantospreadne>
Athirdcausefortheextinofdinosaursistheasteroidthetothistheory，theextinuchmoresuddenandcatastrophithelate1970s，stistsdiscoveredevideheabruptendtotheAgeofDinosaurs.Dr.LouisAlvarezandhiscolleaguesarrivedatarevolutionaryhypothesistoexplaiionofdinosaurs.Theysuggestedthatabout65millio，theEarthwasstruckbyahugeasteroid.Theasteroidwasdestroyedintheexplosion，andbillionsoftonsofdustwerethrownupihickcloudofdustblockedoutsunlightftime.tly，manyplasunlight.Thelatskilledoffma-eatingdinosaurs，whicausedthedeathofthemeat-eatingdinosaursthatpreyedohedarkemperaturetofallbelpointformanymonths.Asaresultofthesuddenclimate，thedinosaurpopulationsbecamesmallerandsmaller.
&heoryadequatelyexplainswhydinosaursdiedout.PerhapsdinosaurssimplyotadjusttothegesthatlatheEarthtowardtheeaceousperiod.PerhapsitwasabinatiotributedtotheendoftheAgeofDinosaurs.
&wo
DoIt!
&omusiedoitquietly.Whilesomedoitintheprivacyoftheirowhersdoitingyms.Forsome，theydoitinthem，ht.Butnomatterwhereorwhen，millionsofpeopleallovertheworlddoit-andthatisaerobicexercise.Thebesularaerobicexercisearegreatbecauseithelppeopleimprovethefunsoftheirheart＆luboioress.
Probablythemostimmediateeffectofaerobicsisimprovedheartandlungfuns.ersonexergaheheartpumpsfasterandbloodiscirculatedwellthroughoutthebody.Siisamuscle，exerciseservestthenit.Astheheartbeesstronger，aperson'sstaminaimprovesaswellashisehesameistrueofthelungs.Apersoiveresultswithibywalkingbrisklyfor30mihreeorfourtimesaweek.
Thesedphysiefitularaerobicexercisetakesalittlebitlooachieve，butiswellworththeeffort，partien.Exerhelppreventthegboioeoporosis（骨质疏松症）.Osteoporosisisagradualprocessofbohatoaturallyaspeoplegrowolder，butitbehaltedbyregularaerobicexercise.Exerciseactuallyhelpsinass，andissaidtobethebestpreveoavoidosteoporosis.
Oiveeffectaboutaerobicexerciseisthatithelpsapersoress.Forexample，aerobicexermakeapersonfeelmorerelaxed，soheiscapableofhandlingdifficulties.Thatis，ersonexercises，hisbloodprovesandheburnsofftheadrenalin（肾上腺素）thatstresscausesthebodytoproduce.Also，exerhelpapersoridofhisstressaftersuffitaerobicexercise，becausehisbodyproducesbeta-endorphins，whiaturalstress-relievingchemicals.
Tosummarize，aerobicexereethodtomakeapersohinweeks.Sinceaerobicexercisedoesnotrequiremuchtimeoreffort，everybodyshouldgetenoughexersteadofwatgtelevisionsomue，apersoeroffwalking.
'sreadaalysisessaywrittenbyaesestudent.
WhyIEnjoyTravel
&likeamagicwater-color-brush，paintsmylifecolorfulandjoyful.WhenIfirststeppedoutofthecitywhereIwasbrewup，Iimmediatelylovedthefeeliingintouchwiththeoutsideworld.Sihen，Ihaveallaingtrips.Ienj，forityperspectives，developmyindependendimprovemyhealth.
First，travelisaivewaytoenriowledge.Iiesandtries，theculturesandsvarygreatly.Forexample，acowisahollyanimaltoIndia；Seoionalholidays.Ihavebeeiesinparativelyspeaking，althoughpeopleallspeakese，theirdialectsdifferfromeachother.Besides，peoplelivingiareasseemtodisplaydistiies.Thesoutherobegentleahenortherners，boldandstraightforward.Therefhmeetingle，Itheirdialederstaures，andgainnewknowledge.
&ravelprovidesmeortunitytobemoreself-reliaingoff，Ihavetomakeatravelplan，bookapla，makeahotelreservationainformationabouttheplaceIwillvisit.Allwillhavetobedonebymyself.Whiletraveliosolvetheproblemsthatmayoexpectedly.ThemomentswhenIlosemypurseorwhenIotgetaretur，Idonnobodybutmyself.Throughtheseseeminglytrivialexperieravel，Ihavebeoretihunforeseendiffilife.
Last，traveltributegreatlytomyhealthintwoways.Forohing，itiofexercisessuchasswimming，skating，gmountains，whiyhealth.F，siravelbringsfunandkeepsmeingoodmood，itreleasesmyworkpressureandhaspositiveeffeeh.Iravelbeallyandphysically.
Insummary，eamytrip，Iaewknowledge，improvemyabilityaermyhealthea，Ihopetomakemorejourneys.Meanwhile，Iwish，mydearfriends，youea'ssharethepleasuresfromtravel.
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Towriteawell-anizedalysisessay，youshouldfollowtheguidelinesbelow.
1.Trytotrolyourprejudiyourcausalreasoning.Forexample，gthatthereasonwhyoneofyourclassmatesfailedhisfihathistea'tlikehimbeirresp.Youshouldeachersimplybecauseyouandyourclassmateareclosefriends.Instead，youshouldexploreallthepossiblereason（s）behindhisfailure.Withoutathoughtfulandthhanalysis，yesuperfidoasituatioooquivestigateyouroeciallywhehyourownproblemsorbeliefs.
2.Avoidoversimplifiwritingaalysisessay.Tople，that“ourpla'spollutionproblemscouldbesolvedifweallrecycled”
isastatementwhiplifiesaplexissue.Mostplexissueshavemorethanonecauseoreffeakeyouranalysisaspleteaspossible.
3.Limityouressaytoadisostimmediate，mostimportantfactors.Asituatiomayhaveseveralcausesoreffects；however，youdoodisinorcausesoreffeapproximately300-wordessay.Insomecases，youdisoteorminorcausesoreffects，butdosoreasonably.Carefullyseleaterialbeagreatassetwheingaalysisessay.
4.Arrangeyourdisofcausesoreffectsagtooonpriheimmediatetotheremote，fromthelocaltothenational，fromtheobvioustothesubtle，fromthecriticaltothelesssignifiajortotheminor，fromthemostimportaimportac..Ofcourse，youalseyourdistheotherwayrouionsareyoushouldpresentyourdistheorderthatmostdeffectivelypresentsyourideas.
Practice5-3-1
Lookatthelistofitemsbelow.Theitemsiaybecausesoreffectsoftheitemsiemsaremixedup.
1）jogging
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