托福作文写作范文详解torm.docx
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1、托福作文写作范文详解ReadingEveryyearzforestfiresandseverestormscauseagreatdealofdamagetoforestsinthenorthwesternUnitedStates.Onewayofdealingwiththeaftermathofthesedisastersiscalledsalvagelogging,whichisthepracticeofremovingdeadtreesfromaffectedareasandusingthewoodforlumber,plywood,andotherwoodproducts.Therear
2、eseveralreasonswhysalvageloggingisbeneficialbothtoadamagedforestandtotheeconomy.Firstzafteradevastatingfirezforestsarechokedwithdeadtrees.Ifthetreesarenotremoved,theywilltakeyearstodecompose;inthemeantime,nonewtreescangrowinthecrampedspaces.Salvagelogging,however,removestheremainsofdeadtreesandmakes
3、roomforfreshgrowthimmediately,whichislikelytohelpforestareasrecoverfromthedisaster.Also,deadtreesdomorethanjusttakeupspace.Decayingwoodisahighlysuitablehabitatforinsectssuchasthesprucebarkbeetle,whichinlargenumberscandamageIivezhealthysprucetrees.Sobyremovingrottingwood,salvagelogginghelpsminimizeth
4、edangersofinsectinfestation,thuscontributingtothehealthoftheforest.ThirdandIastzsalvagelogginghaseconomicbenefits.Manyindustriesdependupontheforestsfortheirproduction,andbecauseofthisafirecanhaveaveryharmfuleffectontheeconomy.Often,however,thetreesthathavebeendamagedbynaturaldisastersstillcanprovide
5、muchwoodthatisusablebyindustries.Furthermore,salvageloggingrequiresmoreworkersthantraditionalloggingoperationsdo,andsoithelpscreateadditionaljobsforlocalresidents.ListeningProfessor:Salvageloggingmayappeartobeaneffectivewayofhelpingforestsrecoverafteradestructivefireorstorm,butitcanactuallyresultins
6、eriouslonger-termenvironmentaldamageItseconomicbenefitsarealsoquestionable.First,cleaningupaforestafterafireorstormdoesnotnecessarilycreatetherightconditionsfortreegrowth.Infact,thenaturalprocessofwooddecompositionenrichesthesoilandmakesitmoresuitableforfuturegenerationsoftree.Therapidremovalofdeadt
7、reescanresultinsoilthatlacksthenutrientsnecessaryforgrowth.Second,itstruethatrottingwoodcanincreaseinsectpopulations,butisthisreallybadfortheforest?Infact,sprucebarkbeetleshavelivedinAlaskanforestfornearlyahundredyearswithoutcausingmajordamage.Andofcoursedeadtreesdonotprovidehabitatsonlyforharmfulin
8、sects.Theyarealsousedbybirdsandotherinsectsthatareimportantcontributorstothelong-termhealthofforests.Inthelongruztherefore,salvageloggingmayendup-doingmoreharmtoforeststhanharmfulinsectsdo.Andthird,theeconomicbenefitsofsalvageloggingaresmallanddonotlastveryIongzinseverelydamagedforests,muchofthelumb
9、ercanberecoveredonlybyusinghelicoptersandothervehiclesthatareexpensivetouseandmaintain.Furthermore,jobscreatedbysalvageloggingareonlytemporaryandareoftenfilledbyoutsiderswithmoreexperienceortrainingthanlocalresidentshave.一、阅读听力要点概括ReadingPassageMainpoints:Salvageloggingisbeneficialforseveralreasons.
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