各位同學：今天游覽圓通大峽谷，是對歷史悠久的探索，是對自然生態的享受。大峽谷的地形落差大，大家要集中注意力，保證旅途安全。狹而深的谷地叫峽谷。它兩坡陡峭，橫剖面呈“V”字形，因河流下蝕而成。大峽谷全長10公里，呈蜿蜒曲帶狀。主要分原始森林景段和瀑布深潭景段兩個部分。大峽谷雖不全國聞名，但特色非常鮮明。一是原始森林歷史悠久，二是瀑布深潭聲響突出。所以旅游者游覽后贊不絕口，說“不來不知道，一來真一跳”。長長的原始森林，松樹、柏樹、櫸樹、樟樹、廣玉蘭樹，什么樹都有。但是最珍貴的是“桫欏樹”。“桫欏樹”被譽為“活化石植物”。它又名樹蕨，非常珍貴,大多為草本，早在2億年前的恐龍時代就有了,那時幾乎全世界都有。高大巍峨而繁茂，恐龍滅絕后,此樹很少,所以被譽為“恐龍時代的活化石”。我們進入原始森林仿佛在與2億年前的歷史對話，你看呢？大家知道，原始森林又被譽為“地球之肺”，這是因為原始森林是最重要的生態系統之一，是陸地生態系統的核心,它維持生態平衡，它涵養水份，它調節氣候,它凈化空氣。原始森林維護自然,它具備的碳物質保持空氣的穩定,使降雨和蒸發平衡，調節氣候,維持生態平衡。大家感覺到嗎？我們似乎行進在氧吧中,非常舒服。大家邊慢步走，邊深深呼吸，快補充氧氣，這是享受自然生態。好,快到峽谷的終端了,又有自然生態要我們去享受。那是什么？是瀑布和深潭。瀑布是從河床橫斷面陡坡懸崖處傾瀉而下的水流，遠觀猶如垂掛于天際的白練，所以稱瀑布；深潭是巖石斷裂而成,就是深水坑、深水池。看瀑布，令人想到古代最經典的詩句。對,大詩人李白的“日照香爐生紫煙，遙看瀑布掛前川。飛流直下三千尺，疑是銀河落九天”。我國有四大名瀑，貴州黃果樹瀑布，瀑面最寬；黃河壺口瀑布，容量大而壯觀；黑龍江吊水樓瀑布形象奇特；雁蕩山大龍湫瀑布，單級落差最高。圓通瀑布呢？高80米，相當于曾譽為“遠東第一樓”的國際飯店的高度（83.9米）。請看,相當于國際飯店高度的瀑布傾瀉而下，氣勢何等壯觀！其形似江水噴發而下,其色如飄浮在空中的素色絲綢;其聲呢？轟然而下,傾瀉于60㎡的深潭，聲如排山倒海的巨浪，聲聲相連，震耳欲聾。聲響如此巨大,就是圓通峽谷瀑布的一大特色了，真可以說“飛流直下三千尺”，萬雷齊轟深水潭了。同學們，回程別有一格。大家看,前面是山腹隧道的道口。上有“圓通峽谷隧道口”七個大字。峽谷是鬼斧神工之作，而山腹隧道則是人間杰作。我們的大巴就要駛入，有5公里。看,彩色燈光閃亮，兩側壁畫連綿,猶若仙境世界。出隧道就能游覽夢中的藏金洞。據說廣西的少數民族有藏金洞，如今不到廣西也看到了。大家看,傳說少數民族的首領，在這里藏有黃金白銀和珍珠寶貝，專用來獎勵建功立業和消災驅邪有成績的人士。如今，黃金白銀和珍珠寶貝看不到了,也許獎勵用完了，才讓我們欣賞到峽谷和瀑布的美景。同學們：歷史美和自然美今天共享，謝謝大家合作,有緣再見！Theclassmate:visitYuantonggrandcanyontoday,istoexplorewithalonghistory,istheenjoymentofnaturalecology.Grandcanyontopographyisremote,everybodywantstoconcentrate,toensureasafejourney.Thenarrowanddeepvalleycalledcanyon.Ittwosteepslope,transversesectionshows\"V\"glyph,becauseundertherivererosion.Grandcanyon10km,thewindingbelt.Mainpointsoftheoriginalforestandwaterfalldeeppoolscenescenetwoparts.Thegrandcanyonnationalfamousornot,buttheverycharacteristics.Oneistheoriginalforesthasalonghistory,andthesecondisthewaterfalldeeppoolsound.Aftertouristsvisitsofullofpraise,said,\"don'tcomedon'tknow,reallyajump\".Longtheprimevalforest,pine,cypress,beechtrees,camphortrees,magnoliatree,whatkindoftree.Butthemostpreciousis\"SuoLuoShu\".\"SuoLuoShu\"isknownasa\"livingfossilplant\".Itisalsoknownastreefern,veryprecious,mostlyherbs,asearlyas200millionyearsagotheageofthedinosaurshad,atthattime,almostallovertheworld.Tallmajesticandlush,afterthedinosaurs,thetreeareveryfew,sohasbeenhailedasa\"livingfossil\"oftheageofdinosaurs.Weenterintotheoriginalforestasifinadialoguewithahistoryof200millionyearsago,yousee?Asweallknow,virginforestsandisknownasthe\"lungsoftheearth,thisisbecausetheprimevalforestisoneofthemostimportantecologicalsystem,isthecoreoftheterrestrialecosystem,itkeepthebalanceofitswaterconservation,itadjustingtheclimate,purifyair.Theprimevalforestnaturalmaintenance,ithascarbonmaterialtokeepthestabilityoftheair,thebalanceofrainfallandevaporation,regulatingclimate,maintaintheecologicalbalance.Youfeel?Weseemtobemarchinginoxygenbar,verycomfortable.Youwalkaway,whilebreathingdeeply,quicklyreplenishoxygen,itistoenjoythenaturalecology.Good,fasttotheendofcanyon,ithasnaturalecologytoustoenjoy.Whatisthat?Isawaterfallanddeeppools.Waterfallfromthecross-sectionalwaterpourdownasteepcliffplace,farviewislikeawhitedrapedfamilypractice,socalledwaterfall;Isadeeppoolofrockfracture,isthedeeppit,deeppool.Toseeawaterfall,reminiscentoftheancienttheclassiclines.Thegreatpoetlibai's\"thesunshinecenserlivingpurplesmoke,itlookslikeawaterfallhangingmaekawa.Plungesthreethousandfeet,suspectedgalaxyninedays\".China'sfourmajororgan,guizhouhuangguoshuwaterfall,BaoMianmostwide;TheYellowRiverhukouwaterfall,largecapacityandmagnificent;Heilongjianghangingwaterfloorfallsimagestrange;Yandangmountaindragonwaterfallqiushui,singlestagedividethehighest.Yuantongwaterfall?Heightof80meters,equivalenttoonceknownasthe\"fareast\"onthefirstfloorofthefirstinternationalhotelheight(83.9m).Behold,thewaterfallisequaltotheinternationalhotelhighlypourdown,imposinggrandeur!Theshapeofriverwatereruption,plaincolouredsilkcolorsuchasfloatingintheair;Itssound?Crashingdown,adeeppoolflowfrom60㎡,soundwaves,suchaslandslidesoundconnected,deafening.Soundssogreat,itistheonebigcharacteristicofYuantonggorgewaterfalls,true\"plungesthreethousandfeet\",sotospeak,onelitedecisiondeeppool.Theclassmates,returndon'thaveone.Yousee,isamountainsideinfrontofthetunnelcrossing.Thereare\"Yuantongcanyontunnel\"sevencharacters.Gorgeisuncannyworkmanship,whilemountainsidetunnelisamasterpieceintheworld.Wewillintothebus,thereare5km.Look,coloredlightsshining,onbothsidesofthemuralsofJudeifwonderlandworld.Outofthetunnelholecanvisitthedreamtohidegold.ItissaidthatGuangximinoritieshavehiddengoldhole,nowcan'talsoseeinGuangxi.,theleaderoftheminorityoflegend,inpossessionofgoldandsilverpearlsherebaby,dedicatedtorewardachievementsandeliminatesevilspiri