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1、TED英語演講稿:我們?yōu)槭裁纯鞓??  whenyouhave21minutestospeak,twomillionyearsseemslikeareallylongtime.butevolutionarily,twomillionyearsisnothing.andyetintwomillionyearsthehumanbrainhasnearlytripledinmass,goingfromtheone-and-a-quarterpoundbrainofourancestorhere,habilis,tothealmo

2、stthree-poundmeatloafthateverybodyherehasbetweentheirears.whatisitaboutabigbrainthatnaturewassoeagerforeveryoneofustohaveone?  well,itturnsoutwhenbrainstripleinsize,theydon'tjustgetthreetimesbigger;theygainnewstructures.andoneofthemainreasonsourbraingotsobigisbec

3、auseitgotanewpart,calledthe"frontallobe."andparticularly,apartcalledthe"pre-frontalcortex."nowwhatdoesapre-frontalcortexdoforyouthatshouldjustifytheentirearchitecturaloverhaulofthehumanskullintheblinkofevolutionarytime?  well,itturnsoutthepre-frontalcortexdoeslot

4、softhings,butoneofthemostimportantthingsitdoesisitisanexperiencesimulator.flightpilotspracticeinflightsimulatorssothattheydon'tmakerealmistakesinplanes.humanbeingshavethismarvelousadaptationthattheycanactuallyhaveexperiencesintheirheadsbeforetheytrythemoutinreall

5、ife.thisisatrickthatnoneofourancestorscoulddo,andthatnootheranimalcandoquitelikewecan.it'samarvelousadaptation.it'suptherewithopposablethumbsandstandinguprightandlanguageasoneofthethingsthatgotourspeciesoutofthetreesandintotheshoppingmall.  now--(laughter)--allof

6、youhavedonethis.imean,youknow,benandjerry'sdoesn'thaveliver-and-onionicecream,andit'snotbecausetheywhippedsomeup,trieditandwent,"yuck."it'sbecause,withoutleavingyourarmchair,youcansimulatethatflavorandsay"yuck"beforeyoumakeit.  let'sseehowyourexperiencesimulators

7、areworking.let'sjustrunaquickdiagnosticbeforeiproceedwiththerestofthetalk.here'stwodifferentfuturesthatiinviteyoutocontemplate,andyoucantrytosimulatethemandtellmewhichoneyouthinkyoumightprefer.oneofthemiswinningthelottery.thisisabout314milliondollars.andtheotheri

8、sbecomingparaplegic.so,justgiveitamomentofthought.youprobablydon'tfeellikeyouneedamomentofthought.  interestingly,therearedataonthesetwogroupsofpeople,dataonho

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