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1、新托福写作真经4test8■综合写作解析前程百利小编觉得托福综合写作是托福考试中最容易得分的部分。所以，大家在这部分一定要保证不要失分。小编接下来和大家分享的是托福写作真经4中testa独立写作的内容。从阅读和听力的要点分析，范文的词汇和万能语句出发，帮助大家更好的了解每一个托福写作话题的写作方式。Reading&ListeningMarsupialsarcagroupofanimalsthatarcconsideredmammals.Thekangarooisthemostwell-knownmarsupial.TheymainlyliveinAustralia;
2、however,somespeciesarcfoundinNewGuinea,SouthAmerica,andNorthAmerica・Fossilevidence,however,showsthatmarsupialsoncelivedvirtuallyeverywhereontheplanet.Yetbecausemarsupialshadtroubleadaptingtotheirenvironments,theydiedoutinmostofthoseplaces.Marsupialsdifferfromothermammalsinthattheydonot
3、haveplacentas,andthusmothersdonotcarrytheirbabiestoterm.Instead,babymarsupialsarebombeforetheyarefiillydeveloped.Uponbeingbom,ababymarsupialcrawlsinsideapouchinitsmother'sbody,whereitremainsuntilitmatures.Unfortunately,beingbornprematurelymeansthatmostmarsupialshaveundevelopedimmunesys
4、tems.Thismakesthemmoresusceptibletoinfectionsandprematuredeath,whichhappenswithgreatfrcqucncy.Marsupialshavealowmetabolicrateincomparisonwithothermammals.Tocontroltheirbodytemperatures,mammalsmustcatfoodtogivethemcncrgy.Butthelowmetabolicrateofmarsupialsmeansthattheyhavetroublemaintain
5、ingwarmthintheirbodieswhenthetemperaturebecomescold.Asaresult,theymostlydiedoutincolderlandsandarcnowprimarilyfoundinplaceswithwarmerenvironmentssuchasAustraliaandSouthAmerica.Inaddition,marsupialsareabsentfrommanylandsnowadaysbecausetheyweresimplyoutcompetedbymammals.Animalsinthesamee
6、cosystemstypicallyviewithoneanotherfortheirfoodandhabitats.Marsupials,weakenedbytheirimmunesystemsandinabilitytocopewithcoldweather,werepushedoutofmanyplacesbymammals,whichprovedtobefarstronger.Asaresult,marsupialstodayonlyliveinafewareasaroundtheworld.阅读要点：观点:Becausemarsupialshadtroub
7、leadaptingtotheirenvironments,theydiedoutinmostofthoseplaces.右袋类动物无法适应环境，因此，大部分地区都见不到他们的踪影。1、Unfortunately,beingbomprematurelymeansthatmostmarsupialshaveundevelopedimmunesystems.0为，有袋类动物繁殖的时候，后代会早产。所以，后代的免疫力都很差。2、Marsupialshavealowmetabolicrateincomparisonwithothermammals.和其他动物相比，有袋动
