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1、共同成长见仁见智ToCloneorNottoCloneCriticsofcloningrepeatthequestionoftenassociatedwithcontroversial(争议的)science:“Justbecausewecan,doesitmeanweshould?”Thecloserwecometobeingabletocloneahuman,thehotterthedebateoveritgrows.Forallthegoodthingscloningmayaccomplish
2、,opponentssaythatitwilldojustasmuchharm.Anotherquestionishowtoregulatecloningprocedures.ThereisnofederallawbanningcloningintheUnitedStates,butseveralstateshavepassedtheirownlawstobanthepractice.TheUSFoodandDrugAdministration(FDA)hasalsosaidthatanyonein
3、theUnitedStatesattemptinghumancloningmustfirstgetitspermission.InJapan,humancloningisacrimethatispunishablebyupto10yearsinprison.Englandhasallowedcloninghumanembryosbutisworkingtopasslegislationtostoptotalhumancloning.Whilelawsareonedeterrent(防止)topurs
4、uinghumancloningatthistime,somescientistsbelievethetechnologyisnotreadytobetestedonhumans.IanWilmut,oneofco-creatorsofDolly,hasevensaidthathumancloningprojectswouldbecriminallyirresponsible.Cloningtechnologyisstillinitsearlystages,andnearly98percentofc
5、loningeffortsendinfailure.Theembryosareeithernotsuitableforimplantingintotheuterusortheydiesometimeduringgestationorshortlyafterbirth.Thoseclonesthatdosurvivesufferfromgeneticabnormalities.Somecloneshavebeenbornwithdefectivehearts,lungproblems,diabetes
6、(糖尿病),bloodvesselproblemsandmalfunctioning(故障的;不起作用的)immunesystems.Oneofthemorefamouscaseswasaclonedsheepthatwasbornbutsufferedfromchronichyperventilation(慢性强力呼吸病)causedbymalformedarteriesleadingtothelungs.Opponentsofcloningpointoutthatwhilewecaneuthan
7、ize(安乐死)thedefectiveclonesofotheranimals,it’smuchmoremorallyproblematicifthishappensduringthehumancloningprocess.Advocatesofcloningrespondthatitisnoweasiertopickoutdefectiveembryosbeforetheyareimplantedintothemother.Thedebateoverhumancloningisjustbegin
8、ning,butasscienceadvances,itcouldbethebiggestethicaldilemmaofthe21stcentury.【问题导入】Tocloneornottoclone,that’sthequestion.Differentpeoplehavedifferentideas.Ascientist:Humancloningismoredangerousthanweaponsofmassdestruction.Asocialist:From
