美国黄石国家公园英文版课件

TodayIwilltalkaboutAmericaYellowstoneNationalPark.美国黄石国家公园英文版NorthEntrance美国黄石国家公园英文版

YellowstoneNationalParkisanationalparklocatedprimarilyintheU.S.stateofWyoming,althoughitalsoextendsintoMontanaandIdaho.ItwasestablishedbytheU.S.CongressandsignedintolawbyPresidentUlyssesS.GrantonMarch1,1872.

Yellowstone,widelyheldtobethefirstnationalparkintheworld,

isknownforitswildlifeanditsmanygeothermalfeatures.美国黄石国家公园英文版OldFaithfulGeyser[ˈɡaɪzɚ]

(老忠实间歇泉)美国黄石国家公园英文版Eruptions[ɪ'rʌpʃn]canshoot3,700to8,400USgallons(14,000to32,000L)ofboilingwatertoaheightof106to185feet(32to56m)lastingfrom1.5to5minutes.Theaverageheightofaneruptionis145feet(44m).Intervalsbetweeneruptionscanrangefrom45to125minutes,averaging66.5minutesin1939,slowlyincreasingtoanaverageof90minutesaparttoday.美国黄石国家公园英文版GrandPrismaticSpring

[prɪzˈmætɪk](大棱镜)美国黄石国家公园英文版TheGrandPrismaticSpringisthelargesthotspringintheUnitedStates,andthethirdlargestintheworld.Thespringisapproximately

[əˈprɒksɪmətli]

80mto90minsizeand50mindepth.GrandPrismaticSpringwasnamedby

themforitsstrikingcoloration.Itscolorsmatchtherainbowdispersionofwhitelightbyanopticalprism['prɪzəm]:red,orange,yellow,green,andblue.美国黄石国家公园英文版美国黄石国家公园英文版TheGrandCanyonoftheYellowstoneisthefirstlargecanyonontheYellowstoneRiverdownstreamfromYellowstoneFallsinYellowstoneNationalPark.Thecanyonisapproximately24mileslong,between244mand366mdeepandbetween0.45kmand1.2kmwide.TheGrandCanyonofthe

Yellowstone

['kænjən]

黄石公园的大峡谷

美国黄石国家公园英文版美国黄石国家公园英文版MammothHotSpring['mæməθ]

(猛犸象温泉)美国黄石国家公园英文版美国黄石国家公园英文版MammothHotSpringsisalargecomplexofhotspringsonahilloftravertine

['trævəti:n]inYellowstoneNationalParkadjacent[əˈdʒeɪsnt]toFortYellowstoneandtheMammothHotSpringsHistoricDistrict.Itwascreatedoverthousandsofyearsashotwaterfromthespringcooledanddepositedcalcium['kælsɪəm]carbonate['kɑ:bəneɪt](overtwotonsflowintoMammotheachdayinasolution).美国黄石国家公园英文版美国黄石国家公园英文版

Flora['flɔ:rə]（植物群）Over1,700speciesoftreesandothervascular

[ˈvæskjələ(r)]plantsarenativetothepark.Another170speciesareconsideredtobeexotic[ɪɡ'zɒtɪk]

speciesandarenon-native.Oftheeightconifer['kɒnɪfə(r)]treespeciesdocumented,LodgepolePineforestscover80%ofthetotalforestedareas.Yellowstonesandverbena[vɜ:'bi:nə]areendemic[enˈdemɪk]totheYellowstone'slakeshores.黄石沙地马鞭草是黄石公园湖边特有的植物。美国黄石国家公园英文版Fauna['fɔ:nə]（动物群）Yellowstoneiswidelyconsideredtobethefinestmegafauna[me'ɡæfɔ:nə]wildlifehabitatinthelower48states.Therearealmost60speciesofmammalsinthepark,includingthegraywolf,thethreatenedlynx[lɪŋks],andgrizzlybears.Otherlargemammalsincludethebison(oftenreferredtoasbuffalo),blackbear,elk,moose[mu:s],mule[mju:l]deer,white-taileddeer,mountaingoat,pronghorn['prɒŋhɔ:n],bighornsheep,andmountainlion.美国黄石国家公园英文版Bison['baɪsn](Buffalo)TheYellowstoneParkbisonherdisthelargestpublicherdofAmericanbisonintheUnitedStates.Therelativelylargebisonpopulationsareaconcernforranchers.美国黄石国家公园英文版美国黄石国家公园英文版NorthwesternWolfThenorthwesternwolf(Canislupusoccidentalis),alsoknownastheMackenzieValleywolfornortherntimberwolfisasubspeciesofgraywolfwhichrangesfromtheupperMackenzieRiverValley,southwardintocentralAlberta.