in1842,BritainancientlivedthescientistCharlieGermany·Irvingtofound“thedinosaur”thisnoun.EnglishdinosaurfromGreekarticledeinos(meaningisterror)Saurosc(meaningislizardorreptile).RegardingIrvingthen,this“theterrorlizard”or“theterrorreptile”isthereptilewhichreferredtoabigwayexterminates.Infact,discoveredatthattimethedinosaurarenotmany.After1989antarcticadiscoverydinosaur,theworldsevencontinentshaddinosaur'svestige.Atpresentintheworldthedinosaurwhichdescribesishadatleast650to700manykindsof(inbiologyspecies).alongwithdinosaur'smassivediscoveriesandresearchthorough,dinosaur'smeaninghadthearcherytargetchange.Thisessence'schangeis:Thedinosaurwasnotonlyexterminated,thehugeancienttimesreptile,moreoverwastheancienttimesreptilewhichcouldstanderectwalks.Someancienttimes'reptile,forinstancewithdinosaursametimepterodactyl,fishdragon,plesiosaurusandsoon,isalsohugeaftertheanimalwhichexterminates.Buttheycannotusetwoorfourlegswalkontheland,thereforetheyarenotthedinosaur.Reptilesomearetheadvancebycreeping,walkswhentheabdomenclingsthetread,thefourlimbstriesthecenterofresistanceinbody'sbothsides,likenowadays'sturtle,alligatorandsoon;Somewalkwhenthebodyleavesthegroundslightly,butcanonlytaketheveryshortroad,likeonekindofnameddragonParkeralligator'sancienttimesalligator,aswellasmoderncertainalligators;Moreoveristhedinosaurcanequallylikelyintheorganicevolutionhistorythemostsuccessfulplace.Thereforewemaysaylikethis:Thedinosaurwasthelifeisabout23,500,000,000to65,000,000yearago,canwalk,alreadyakindofterrestrialreptilewhichbythehindlegssupportbodyerectnessexterminated.(ShanghaiScienceandtechnologyEducationPublishinghouse"ChineseDinosaur"author:ZhenShuona)