关于恐龙的英文介绍PPT演示.ppt

,dinosaur,Hello,everybody,Imverygladtostandheretotalksomethingwithyou,thentodayIdliketosharemytopicaboutdinosaurs,dinosaur,Asyoucansee,thedinosaursintrouducednowisrealdinosaurs,notlikethisO_O”,WhatisaDinosaur?,Dinosaursareaclassofanimalswhichlivedabout6500millionyearsago,anditcansupportthebodyupright,thecontrolofglobalterrestrialecosystemsover100millionyears.Mostdinosaurshavebecomeextinct.butthedescendantsofdinosaurs-birds,surviveandreproducesofar.,恐龙是生活在距今大约6500万年前的、能支撑身体直立行走的的一类动物，支配全球陆地生态系统超过1亿年。大部分恐龙已经灭绝，但是恐龙的后代鸟类存活下来，并繁衍至今。,Asisknowntousall,therearevarietiesofdinosaurslonglongagosuchasCarnivorousdinosaur,Stegosaurusandsoon.,Thesedinosaurswalkedontwofeet.Theyhadthick,dome-shapedskulls.Scientiststhinktheymayhaveusedtheirthickheadstobuttotherdinosaurs,肿头龙是用两条腿走路的，它们有很细的，圆顶形的头骨，科学家认为它们有可能是用它们细小的头部去顶撞其他恐龙的。,PACHYCEPHALOSAURS,肿头龙,STEGOSAURS,剑龙,Theseornithischianswalkedonfourlegsandhadarowofbonyplatesdowntheirback.Stegosaurus,alargestegosaur,alsohadspikesonitstail.Ituseditsspikedtailforfightingoffmeat-eatingtheropods.Stegosauruswasabout30feet(9meters)long.,这些鸟臀目恐龙用它的四条腿走路，而且它们的背上有一排骨板，剑龙，大的剑龙，在它的尾巴上有那种板钉状的东西，它经常用它那带有板钉的尾巴去和兽脚亚目食肉恐龙战斗，剑龙是大约30英尺（9米）长。,Oviraptor,偷蛋龙,Theoviraptoridsareatheropodgroupinwhichtheskullandmandiblearehighlymodified.Oviraptoridsarecharacterizedbyashortsnout,theabsenceofteeth,atallmandible,alongpa-rietal,anenlargedtooth-likeprocessonthepalate,andalarge,anteriorlylocatedexternalman-dibularfenestra,偷蛋龙是一种兽脚亚目食肉恐龙，它的头部和下颚骨都是改进过的，偷蛋龙的特点就是有很短的吻部，缺损的牙齿，壮实的下颚骨，还有一个长长的顶和一个扩充的像牙齿一样的东西，一个大的，前面的位于下颌外部的孔,Theextinctionofdinosaurs,Thoughtdinosaursonceweretheoverlordoftheword,theydiedoutfinally.Withregardtothereasonsfortheextinctionofdinosaurs,itisstillbeingstudied.Foralongtime,themostauthoritativeview,andtheextinctionofthedinosaurs6500yearsagoaboutalargemeteorite.Accordingtothestudy,therewasa7-10kmindiameterasteroidwillfallontheearthssurface,causingalargeexplosion,suchasthrowingalotofdustintheatmospheretoformtheZhetianbiriHouseofSandandFog,ledtothesuspensionofplantphotosynthesis,Andthereforetheextinctionofthedinosaurs.,Theextinctionofdinosaurs,Inaddition,thereissomeotheropinions,suchasclimatechange,saidthespecies,saidthefightandcontinentaldrift,saidAfterall,thedinosaurshaveextinctedNowadaysourhumanbeingslife