BBC经典《行星地球》英文解说词全集.docx

BBC经典《行星地球》英文解说词全集.docx

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BBC经典《行星地球》英文解说词全集

BBC经典-《行星地球》英文解说词（全集）

行星地球英文解说词

第1集PLANETEARTHFromPoletoPole

AhundredyearsagotherewereoneandahalfbillionpeopleonEarth.Now,oversixbillioncrowdourfragileplanetEarth.Butevenso,therearestillplacesbarelytouchedbyhumanity.ThisserieswilltaketothelastwildernessesandshowyoutheplanetEarthanditswildlifeasyouhaveneverseenthembefore.Imagineourworldwithoutsun.MaleEmperorpenguinsarefacingthenearestthatexistsonplanetEarthEarth-winterinAntarctica.It'scontinuouslydarkandtemperaturesdroptominusseventydegreescentigrade.Thepenguinsstaywhenallothercreatureshavefledbecauseeachguardsatreasure:

asingleeggrestedonthetopofitsfeetandkeptwarmbeneaththedownybulgeofitsstomach.Thereisnofoodandnowaterforthem,andtheywillnotseethesunagainforfourmonths.Surelynogreaterordealisfacedbyanyanimal.AsthesundepartsfromtheAntarcticitlightenstheskiesinthefarnorth.It'sMarchandlightreturnstothehighArctic,sweepingawayfourmonthsofdarkness.Apolarbearstirs.Shehasbeeninherdenthewholewinter.Heremergencemarksthebeginningofspring.Aftermonthsofconfinementundergroundshetoboggansdowntheslope.

senseofurgency.Atlastitseemsthatthey'rereadyfortheirjourneyandthey'reonlyjustintime,forafewmilesfromthecoasttheiceisalreadysplitting.Nowthemothercanstarthuntingforthesealstheymusthave,butshe'sleadinghercubsintoadangerousnewworld.Nearlyhalfofallcubsdieintheirfirstyearoutontheice.Summerbrings24hoursofsunlightandthethawingshiftinglandscape.FurthersouththewintersnowshavealmostclearedfromtheArctictundra.NorthernCanada'swildfrontier.Herenaturestagesoneofhergreatestdramas-EveryyearthreemillioncariboumigrateacrosstheArctictundra.Theimmensityoftheherdcanonlybeproperlyappreciatedfromtheair.Someherdstravelover2,000milesayearinsearchoffreshpastures.Thisisthelongestoverlandmigrationmadebyanyanimal.They'reconstantlyonthemove.Newborncalveshavetobeupandrunningthedaytheyareborn.Butthevastherdsdonottravelalone.Wolves.Packsofthem,eighttotenstrong,shadowthemigration.Andtheyarehungry.It'sthenewlyborncalvesthattheyareafter.Runningdirectlyattheherdisaploytogeneratepanic.Theherdbreaksupandnowit'seasiertotargetanindividual.Inthechaosacalfisseparatedfromitsmother.Thecalfisyoung,butitcanoutrunthewolfifonlyitmanagestokeepitsfooting.Atthisstagetheoddsareeven-eitherthecaribouwillmakeamistakeorafteramilethewolfwillgiveup.Midsummeronthetundraandthesundoesnotset.Attheselatitudesthesun'sraysareglancingandnotenoughoftheirenergyreachesthegroundtoenabletreestogrow.You'llneedtotravel500milessouthfromherebeforethatispossible.Thesestuntedshrubsmarkthetreeline-thebeginningoftheborealforest-thetaiga.Theneedle-shapedleavesoftheconifersarevirtuallyinediblesothisforestsupportsverylittleanimallife.It'sasilentplacewherethesnowisunmarkedbyfootprints.IntheArcticwintersnowformsacontinuousblanketacrosstheland.Butasspringcreepsupfromthesouththetaigaisunveiled.ThisvastforestcirclingtheglobecontainsathirdofallthetreesonEarthandproducessomuchoxygenitchangesthecompositionoftheatmosphere.Aswetravelsouthsothesun'sinfluencegrowsstrongerandat50degreesoflatitudearadicaltransformationbegins.Summersherearelongenoughforbroadleaftreestoreplaceconifers.Broadleavesaremucheasiertoeatanddigestsonowanimalscancollecttheirshareoftheenergythathascomefromthesun.It'ssummerandtheseforestsarebustlingwithlife.Butthegoodtimeswillnotlast.Broadleavesmustbeshedinwinterfortheirdamagebyfrost.Astheydisappear,sothelandbecomesbarrenwithlittleforanimalstoeat.Theinhabitantsmustmigrate,hibernate,orfacemonthsofnearstarvation.TheAmurleopard-therarestcatintheworld.Here,inthedeciduousforestsofeasternRussiathewintermakeshuntingverydifficult.Prayanimalsarescarce,andthere'snoconcealingvegetation.Thecubisayearoldandstilldependentonitsmother.Deerarefrequentcasualtiesoftheharshwinterandtheseleopardsarenotabovescavengingfromacorpse.Africanleopardscouldneversurvivehere,buttheRussiancatshavethickfurtoshieldthemfromthecold.ThereareonlyfortyAmurleopardsleftinthewildandthatnumberisfalling.Likesomanycreatures,thecatshavebeenpushedtotheveryedgeofextinctionbyhuntingandthedestructionoftheirhabitat.TheAmurleopardsymbolisesthefragilityofournaturalheritage.Thefutureofanentirespecieshangsonsurvivalofatinynumberofmotherslikethisone.Allanimals,rareorcommon,ultimatelydependfortheirenergyonthesun.InJapanthearrivalofthecherryblossomannouncesthebeginningofspring.Thesun'senergybringscolourtothelandscape.Theearth,asitmakesitsannualjourneyaroundthesun,spinsonatiltedaxis.Andit'sthistiltthatcreatestheseasons.Theadvanceoftheseasonsbringsconstantchange.Asthesun'sinfluencediminishesinthenorth,sothedeciduousforestsofAmericabegintoshutdownlosingtheirleavesinpreparationforthedarkcoldmonthsahead.Oneseasonhandsovertoanother.Someorganismsthriveondecay,butmostmustmakespecialpreparationsforwinterandalifewithlittlesun.Wholepopulationsofanimalsarenowforcedtotravelgreatdistancesinpursuitoffoodandwarmth.300,000BaikaltealgathertoescapefromtheSiberianwinterbymigratingsouthtoKorea-theworld'sentirepopulationinasingleflock.Buttherearepartsoftheworldthathavenoseasons.Inthetropicsthesun'sraysstriketheearthheadonandtheirstrengthismoreorlessconstantallyearround.Thatiswhythejunglegrowssovigourouslyandsupportssomuchlife.Thisforestcoversonly3percentoftheplanet'ssurface,butitcontainsmorethan50percentofallitsplantsandanimals.Thecanopyisparticularlyrich.Therearemonkeys,birdsandmillionsofspeciesofinsects,exactlyhowmanywehavenoidea.Thecharacteroftheforestchangesaswedescend,becomingeverdarkeranddamper,favouringdifferentkindsofanimalsandplants.Lessthan2percentofthesunlightreachesthefloor,butevenherethereisextraordinaryvariety.InthegreatislandofNewGuineathereare42differentspeciesofbirdsofparadise,eachmorebizarrethanthelast.Thisforestissorichthatnourishingfoodcanbegatheredveryquickly.Thatleavesthemalesix-plumedbirdofparadisewithtimetoconcentrateonothermattersliketidyinguphisdisplayarea.Everythingmustbespickandspan.Allisready.Veryimpressive,butnooneiswatching.Thesuperbbirdofparadisecallstoattractafemale.Andhehasmoreluck.Butwhatdoeshehavetodotoreallyimpressher?

Sheretirestoconsiderherverdict.It'shardnottofeeldeflatedwhenevenyourbestisn'tgoodenough.Thesuninfluenceslifeintheoceansjustasitdoesonland.Itsrichestpartsarethosewherewavesandcurrentsbringfertilisingnutrientstosurfacewatersthatarebathedinsunlight.TheseasofftheCapeinSouthAfricahavethismagicrecipeandarehugelyproductive.Summeristhetimeofplentyandit'snowthatthesealsstarttobreed.Thestrikeofagreatwhitesharklastsameresecond.Slowingitdownfortytimesrevealsthetechniqueandimmensestrengthofthismassivepredator.Ifsurprisefails,therewillbeachase.Thesharkisfasteronastraightcoursebutitcan'tturnassharplyastheseal,itsagilityversuspower.Oncethesealshavefinishedbreedingthegiantsharkswillmoveon.It'snowbecomingclearthatgreatwhitesmigratethousandsofmilesacrosstheoceanstoharvestseasonalabundancesindifferentseas.Thesun,beatingdownontropicalwaters,powerstheweathersystemsoftheglobe.Moistureevaporatesfromthewarmingoceanandrisestocreategreatstorms.Thewindsgeneratedoutatseasweepinlandacrossthecontinents.AstheytravelacrosstheSaharatheycreatethebiggestofallsandstormsblowingsandhalfwayroundtheworldtofertilizetheAmazonjungle.WindsblowingacrosstheIndianOceancollectmoistureandsweepnorthwardstowardstheHimalayas.Astheairrises,soitcools.Thewateritcarriescondensesintocloudsandthenfallsasthelifegivingrainsofthemonsoon.Soaircurrentspoweredbythesuncarrywetairtothemiddleofcontinents.Withoutwatertherecanbenolife,butitsdistributionoverthelandisfarfromeven.Desertscoveronethirdoftheland'ssurfaceandthey'regrowingbiggereveryyear.ThisistheKalahariDesertinSouthernAfrica.It'sthedryseasonandthousandsofelephantshavestartedtotravelindesperatesearchforwater.AllacrossSouthernAfricaanimalsarejourneyingforthesamereason.Buffalojointhegreattrek.NowhereelseonEartharesomanyanimalsonthemovewiththesameurgentpurpose.They'reallheadingfortheswampsoftheOkavango,avastinlanddelta.Atthemomentitisdry,butwateriscoming.Thetravellersarehamperedbydangerousduststorms.Femalesandcalvescaneasilygetseparatedfromthemainherd.Forthispairsanctuaryliesinthepatchofwoodlandafewmilesahead.Theycan'trestuntiltheyreachit.Themainhasalreadygottheresafely.Finally,thestragglersemergefromthedust.Theexhaustedcalfisstillblindedbysand.Itsmotherdoeseverythingpossibletohelpit.Thestormisnowsubsiding,butnotalltheelephantshavebeensolucky.