托福听力TPO66 ScriptWord文件下载.docx
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托福听力TPO66 ScriptWord文件下载.docx
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Whynot?
Ohwellyouknow.It'
safunnythingaboutacademia.You'
dthinkscholarswoulddoresearchabouteverytopicimaginable.Butactuallysomeauthors,somegenresaren'
trespectedverymuch.Sonotverymuchiswrittenaboutthem.UhGothicliterature,detectivenovels...
Butthat'
swhattheconferencewasabout?
Yeah,prettymuch.Itwaskindofsubversive,Iguess.Butthere'
sawholewealthofknowledgeouttherejustwaitingtobeexplored.Ifindthatreallyexciting.
Sure.
Yeahuhanyway.Youwantedtoaskmeaboutthefinalpaper?
YeahwhichIseenowtiesintothethemeofthatconference.Sincewe'
resupposedtowriteaboutabookfromoneofthoselessergenres.Iwaswonderingwhataboutsciencefiction?
Sure,thoughit'
sagenrethat'
sactuallygettingmoreandmorerespectwithinacademia.TherewasevenatalkattheconferenceaboutJackVance.
OhHewroteplanetofadventure,right?
YeahHe'
sawellresearched-respectedsciencefictionwriter.Ifyou'
reinterestedinsciencefiction,youcouldlookthemup.Thatleadyoutolotsofotherauthorsandlotsofpossibilitiesforyourpaper.
Great,wellI'
mrelievedyouthinkthat'
sagoodgenretostudy.I'
llfindabookthatinterestsmeanddothepaperonthat.Itseemslikemostpeopleassumethatsciencefictioniskindoflike,Idon'
tknow,junkliterature.
Yes,alotofpeopledo.
Yeah.ButI'
vereadsomethingsandIthinkthatsomeofitisreallywellwrittenandittakessomuchimaginationtowritesci-fi.
WellCarefulthoughthere'
sadifferencebetweensciencefictionandsci-fi.
Whatdoyoumean?
Wellseesci-fi,that'
swhatyouyoutendtoseeinfilms.Ithasallthespaceshipsandrobots.Anditfocusesonexotictechnology.Youknowawowfactorletlikespecialeffectsattheexpenseofawellwrittenstory.Ithinkalotofpeopledon'
trealizethisandtendnottomakeadistinction.
Okay.
Buttruesciencefictionismuchmoreintellectualthanthat.Thestoryisveryimportant.Andeventhoughitmighttakeplaceinanimaginaryworld,anditmighthaveexoticgadgets,thefocusisontheplot.Sciencefictioncreatesmetaphorsaboutourworld.Andwellwhatitmeanstobehuman.It'
smeanttogetpeopletothinkaboutrealthingslikelikehistoryandhumanbehavior.That'
sworthyofyourtime,butnotsci-fi.
Great.WellUhcanIletyouknownextweekwhichbookIwanttowriteabout?
Lecture1
Listentopartofalectureinabiologyclass.
Okay.TodayIwanttotalkaboutsleep.Weallsleep,humanssleep,manyanimalssleep.Whenwesleep,wearen'
tactuallyunconscious,butinastateofreducedawarenessofoursurroundings.Nowwhatdoesthatmeanforanimalsinthewildifthey'
reinastatelikethat,unabletomonitortheirenvironment?
Wellthey'
rehelpless,vulnerabletopredators,maybe?
Right.They'
revulnerabletopredators,yettheysleep.Solet'
stalkaboutwhy?
Thebiologyofsleep.SothefirstthingIwantyoutounderstandisthatsleepsaveryriskybehavior.Andriskybehaviorsdon'
tevolveunlesstheybringtheanimalssomekindofbenefitthatoutweighsthatrisk.Sosleepmusthaveareallyimportantfunction.AndIwannaemphasizethatthere'
sadifferencebetweensleepandotherformsofinactivity,likeregularrest.Theinsects,forinstance,rest,buttheydon'
tsleep.What'
sspecifictosleepisthatthebrainaltersmanyofitsusualactivities,includingitsconnectiontosensoryandmotororgans.Ititshutsthoseconnectionsdown.Soasleepinganimalcanusuallyneithersensenormove.AndIsayusuallybecausewellwellwe'
llgettothatinaminute.
Sobasicallyallmammalsandbirdssleep,buttherearesomeunusualwaysofsleeping.Takemarinemammalslikedolphins,dolphinsneedtoswimupforaironceinawhile.Sotheycan'
tcompletelyshutoffallmovementandsensationsotheirbraincan'
tshutdowncompletely.Butdolphinsgetaroundthis.How?
Well,theysleeponebrainhemisphereatatime.Sleepingdolphinsactuallylooklikethey'
rejustrestingawakeandoccasionallyswimupforair.Sohowcanweeventellthey'
resleeping?
Wellwemeasuredtheirbrainactivity,whichshowedthat1/2wasactivewhiletheotherwassleeping.Ohthat'
ssomeadaptation,Huh?
Sowhatisthefunctionofsleep?
AsIsaid,itmustbeimportant.Butwhy?
Okay,Iknowyou'
realltemptedtosayumthatsleepswhenthewholebodyrests.Thatsleepisourmechanismtotorecoverfromphysicalactivity.AndAndit'
struewhenyousleep,yourmuscleslosetheirtone,theyrelax,thebodysavesenergy.ButthiscouldhappenevenduringregularwakingrestImeantha
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