1到4听力原文

Pompeii听力原文ThelectureforthisclassisaboutthecityofPompeii.Anaturaldisasteroccurredtherealmost2000yearsago.TodaymanyrichpeoplewholiveinlargemetropolitanareassuchasBeijing,ParisandNewYorkleavethecityinthesummer.Theygotothemountainsortotheseashoretoescapethecitynoiseandhit.2,000yearsago,wealthyRomansdidthesamething.TheyleftthecityofRomeinthesummer.ManyofthesewealthyRomansspenttheirsummersinthecityofPompeii,abeautifulcity,locatedontheBayofNaples.Inthesummeroftheyear79C.E.,ayoungRomanboywholaterbecameaveryfamousRomanhistorianwasvisitinghisuncleinP..Theboy’snamewasPlinytheYounger.OnedayPlinywaslookingupatthesky.Hesawafrighteningsight.Itwasaverylargedarkcloud.Thisblackcloudrosehighintothesky.WhatPlinysawwastheeruptionofthevolcanocalledMountVesuvius.Rockandashflewthroughtheair.ThecityofP.wasatthefootofMt.V..Whenthevolcanofirsterupted,manypeoplewereabletogetoutofthecityandtoescapedeath.Infact,18,000peopleescapedtheterribledisaster.Unfortunately,therewasnotenoughtimeforeveryonetoescape.Morethan2,000peopledied.Theseunluckypeoplewereburiedaliveunderthevolcanicash.Theeruptionlastedforabout3days.Whentheeruptionwasover,P.wasburiedunder20feetofvolcanicrockandash.ThecityofP.wasforgottenforalmost1,700years.Intheyearof1748anItalianfarmerwasdiggingonhisfarm.Ashewasdigging,heuncoveredapartofawalloftheancientcityofP..Soonarchaeologistsbegantodiginthearea.Astimewentby,muchoftheancientcityofP.wasuncovered.TodaytouristscomefromallovertheworldtoseetheruinsofthefamouscityofPompeii.Napoleon学术英语视听说unit1原文Today,I’mgoingtotalktoyouaboutoneofthemostimportanthistoricalfiguresinEuropeanhistory:NapoleonBonaparte.Let’sstartbytalkingabouthisearlylife.Napoleonwasbornin1769ontheislandofCorsica.Whenhewasonly10yearsold,hisfathersenthimtomilitaryschoolinFrance.N.wasnotaverygoodstudentinmostofhisclasses,butheexcelledinmathematicsandmilitaryscience.Whenhewas16yearsold,hejoinedtheFrencharmy.Inthatyear1785hebeganthemilitarycareerthatwouldbringhimfame,power,riches,andfinallydefeat.N.becameageneralintheFrencharmyattheyoungageof24.N.hadmanyvictoriesonthebattlefieldbuthealsobecameinvolvedinFrenchlawandpolitics.Andin1804,attheageof35,hebecamethefirstemperoroftheFrance.N.wasmanythings.Hewas,firstofall,abrilliantmilitaryleader.Hissoldierswerereadytodieforhim.Asaresult,N.wonmanymilitaryvictories.AtonetimehecontrolledmostofEurope,butsomecountries,includingEngland,Russia,andAustriafoughtfiercelyagainsthim.Hisdefeat—“hisend”camewhenhedecidedtoattackRussia.InthismilitarycampaignagainstRussia,helostmostofhisarmy.ThegreatFrenchconquerordiedalone—desertedbyhisfamilyandfriendsin1821.N.wasonly51yearsoldwhenhedied.学术英语视听说1原文Unit4RollerCoastersLet'stalkaboutthephysicsinvolvedinarideonarollercoaster.I'msuremanyofyouhavetakenarideonarollercoaster.Asimplerollercoasterconsistsofaframewithatrackonit.Thetrackisverymuchlikeatraintrack,thistrackgoesoveraseriesofhillsandaroundcurves.Itfollowsapaththatendsatthesameplaceitstarted.Atrainofcarstravelsaroundonthistrack,veryfast.Thecarshavetwosetsofwheels.Onesetofwheelsrollsontopofthetrack,andtheotherssetofwheelsrollsbelowthetrack.Thewheelsbelowthetrackkeepthefastmovingcarsfromcomingoffthetrack,rollercoastercarsasyouprobablyknowdon'thaveanymotorsorengines.Instead,achainpullsthecarsupthefirst,tallestandsteepystaffhill,thisishowtheridebegins.Then,atthetopofthehillthechaincomesoffthecarsandgravitytakesover.gravitypushesthecarsdowntheothersideofthehill.thetallerandsteeperthefirsthillis,thefastertheridewillbe.Andthefartherthecarswilltravel.asthecarsrolleddownhilltheygainedspeed.thecarshaveenoughspeedandenergytosendthemupthenexthill.asthecarsnearthetopofthesecondhilltheybegintoslowdown.butthen,thecarsreachedthetopofthathill,andstartdowntheotherside.gravityagainpushesthemtowardtheground.thisprocessrepeatsoneachhale.Okay,solet'sgooverthisprocessagain.first,thecarsarepulledbyachainupthefirsthighesthill.thentheygodownaverysteepslope,atthispoint,thereisenoughenergytopullthecarsupandoverthenexthill.whentheyreachedthebottomofthathill,thereisenoughenergytoclimbthenexthill,therollercoastercarsloseenergyastheridecontinues.so,thehillshavetobesmallertowardtheendofthetrack,finallywerolltoastopongroundlevelrightwherewebegan.I’dliketotalktoyoutodayaboutSteveJobs.Jobswassomeonewhochangedtheworldbecausehechangedthewaypeopleacteverysingleday.Jobswasbornin1955.HegrewupinCalifornia,inthatarealaterbecameknownasthesiliconvalley.Whenhewasabout14yearsold,hebecamefriendswithStevenW.Wwaswhatpeopleinthosedayscalledanelectronicwithkid.He’dliketodesignandbuildhisownelectronicequipment.In1975,Wstaredtodesignapersonalcomputer,thiswasatthattimewhennobodyownpersonalcomputersintheirhomes.Jobswasyoung,hewasonly20,buteventhen,hehaveashapebusinessbrain.JobsconvincedWthattheircouldbuildthesepersonalcomputersandgrageandsellthem.Ayearlater,JobsandWfoundedtheApplecomputercompanyandstartedbuildingandsellingpersonalcomputers,whentheirAppletwocomputerwentonthemarketin1997,itbecameahugesuccess.Suddenly,therewasamassmarketforcomputerthatpeoplecouldbuyandstoreandusesetintherehomes.TheAppl