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1、TED英語(yǔ)演講稿：我們?yōu)槭裁纯鞓?lè)？Whenyouhave21minutestospeak,twomillionyearsseemslikeareallylongtime.Butevolutionarily,twomillionyearsisnothing.Andyetintwomillionyearsthehumanbrainhasnearlytripledinmass,goingfromtheone-and-a-quarterpoundbrainofourancestorhere,Habilis,tothea
2、lmostthree-poundmeatloafthateverybodyherehasbetweentheirears.Whatisitaboutabigbrainthatnaturewassoeagerforeveryoneofustohaveone?Well,itturnsoutwhenbrainstripleinsize,theydon'tjustgetthreetimesbigger;theygainnewstructures.Andoneofthemainreasonsourbraingotsobi
3、gisbecauseitgotanewpart,calledthe"frontallobe."Andparticularly,apartcalledthe"pre-frontalcortex."Nowwhatdoesapre-frontalcortexdoforyouthatshouldjustifytheentirearchitecturaloverhaulofthehumanskullintheblinkofevolutionarytime?Well,itturnsoutthepre-frontalcort
4、exdoeslotsofthings,butoneofthemostimportantthingsitdoesisitisanexperiencesimulator.Flightpilotspracticeinflightsimulatorssothattheydon'tmakerealmistakesinplanes.Humanbeingshavethismarvelousadaptationthattheycanactuallyhaveexperiencesintheirheadsbeforetheytry
5、themoutinreallife.Thisisatrickthatnoneofourancestorscoulddo,andthatnootheranimalcandoquitelikewecan.It'samarvelousadaptation.It'suptherewithopposablethumbsandstandinguprightandlanguageasoneofthethingsthatgotourspeciesoutofthetreesandintotheshoppingmall.Now--
6、(Laughter)--allofyouhavedonethis.Imean,youknow,BenandJerry'sdoesn'thaveliver-and-onionicecream,andit'snotbecausetheywhippedsomeup,trieditandwent,"Yuck."It'sbecause,withoutleavingyourarmchair,youcansimulatethatflavorandsay"yuck"beforeyoumakeit.Let'sseehowyour
7、experiencesimulatorsareworking.Let'sjustrunaquickdiagnosticbeforeIproceedwiththerestofthetalk.Here'stwodifferentfuturesthatIinviteyoutocontemplate,andyoucantrytosimulatethemandtellmewhichoneyouthinkyoumightprefer.Oneofthemiswinningthelottery.Thisisabout314mi
8、lliondollars.Andtheotherisbecomingparaplegic.So,justgiveitamomentofthought.Youprobablydon'tfeellikeyouneedamomentofthought.Interestingly,therearedataonthesetwogroupsofpeople,dataonhowhappytheyar
