读写教程3 第三版 Unit 6Reading Material.ppt

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1、ReadingMaterialHistoryofCellPhonesIntoday’sworld,mostpeoplecommunicatethroughtheuseofcellphones.It’shardtobelievethattwentyyearsagocellphoneswereararity1.Belowisahistorychronicling2thedawnofthecellphonetoitscurrentstate.1843―Askilledanalytical3chemistbythenameofMic

2、haelFaradaybeganexhaustive4researchintowhetherspacecouldconduct5electricity.Faradayexposedhisgreatadvancesofnineteenth-centuryscienceandtechnologyandhisdiscoverieshavehadanincalculable6effectonthetechnologyleadingtowardcellphonedevelopment.1.rarityn.奇物；珍品2.chronicl

3、evt.记载(大事)3.analyticala.分析的4.exhaustivea.深入彻底的5.conductvt.传导（电，热等）6.incalculablea.不可计算的1865―Dr.MahlonLoomisofVirginia,adentist7,mayhavebeenthefirstpersontocommunicatethroughwirelessvia8theatmosphere.Between1866and1873hetransmitted9telegraphicmessagesatadistanceof18

4、milesbetweenthetopsofCohoctonandBeorseDeerMountains,Virginia.1973―Dr.MartinCooper,isconsideredtheinventorofthefirstportable10handset11.Dr.Cooper,formergeneralmanagerforthesystemsdivisionatMotorola,isthefirstpersontomakeacallonaportablecellphone.7.dentistn.牙医8.viapr

5、ep.通过；经由9.transmitvt.发射信号10.portablea.便携式的11.handsetn.手机；手持机1973―Dr.CoopersetupabasestationinNewYorkwiththefirstworkingprototype12ofacellphone,theMotorolaDyna-Tac.Dr.CooperandMotorolatookthephonetechnologytoNewYorktoshowtothepublic.1977―Cellphonesgopublic.Publiccel

6、lphonetestingbegan.Thefirsttrials13beganwith2000customers,andeventuallyothercellphonetrialsappearedintheWashingtonD.C.andBaltimorearea.Japanbegantestingacellularphone14servicein1979.12.prototypen.原型13.trailn.试验，检验14.cellularphone手机1988―Thisyearchangedmanyofthetechn

7、ologiesthathadbecometypicalinthepast.TheCellularTechnologyIndustryAssociation(CTIA)wasdevelopedtolaydown15practicalgoalsforcellularphoneproviders.Thisincludedresearchfornewapplications16forcellphonedevelopment.AnewstandardwasplacedwiththecreationoftheTDMAInterim17S

8、tandard54,in1991bytheTelecommunicationsIndustryAssociation.15.laydown制定（目标，原则，规定等）16.applicationn.应用；运用17.Interima.暂时的；临时的；过渡时期的Inspiteoftheunbel