《電子信息類專業(yè)英語》課件-第9章

Unit9ComputerNetworks英文產(chǎn)品說明書的閱讀

Inthe1960s,almostimmediatelyaftercomputersbecamewidespread,thedesiregrewtoconnectcomputerstogether.Originallytheaimwastoallowtheexchangeofinformation(programs,datafiles)betweentheusersofdifferentmainframes.Whensmallercomputersbecameavailableandspreadinlargenumberswithinasingleorganization,connectionsbetweenthesesmallcomputersbecameattractivefortheshareduseofresourcesaswell.Theresultingsystems,inwhichcomputersofpossiblydifferenttypeandsizeareconnectedbutfullyretaintheirautonomy,arecalledcomputernetworks.

Computernetworks,world-widenetworksof(large)computersarereferredtoaswideareanetworks(WAN)andcampus-widenetworksof(small)computersarereferredtoaslocalareanetworks(LAN).

Toreducethedesigncomplexity,networkarchitectureisviewedasaseriesoflayerorlevels.Eachlayer(orlevel)consistsofprotocolsthatusefunctionsoflowerlayersandprovideservicestothehigherlayers.Eachlayerperformswell-definedfunctions,andcanbeoflimitedcomplexity.Togetherthelayersimplementthefacilitiesofthenetwork.

TheapproachtonetworkarchitectureandimplementationwasstandardizedintheInternationalStandardsOrganization’sOSIreferencemodelforOpenSystemsInterconnection(OSI).ThemodelcontainssevenlayersandisshowninFig.9-1.

Fig.9-1ThemodelofOSI

Theincreasedcapabilitiesofthenetworksallowproviderstoofferawidervarietyofcommunicationservicesthanthetraditionalvoiceservices.Howweobtainnewsandentertainment,conductbusinessandeducation,andaccomplishscientificandtechnicalresearchwillallbeaffected.Networkscanbeanalog,inwhichinformationisrepresentedbycontinuoussmoothlyvaryingsignals,ordigital,inwhichinformationisrepresentedbydiscreteon/offsignals.

Therearethreemajorcategoriesofnetworksdistinguishedprimarilybygeographywide-areanetworks,metropolitan-areanetworks,andlocal-areanetworks.Thebenefitofnetworkisthatitcantransmitinformationrapidlyandeasilyamongwidelyseparatedpeople;peoplecansharehardwareandsoftwareresourcesonthenetwork;acomputernetworkcanalsoprovidehighreliabilitybyhavingalternativesourceofsupply.

Asthesenetworkshavegrowninpopularity,theyhavebeguntointerconnect,creatingaglobalcollectionofpeopleandcomputersthatareabletoelectronicallycommunicatewithoneanother.

英文產(chǎn)品說明書的閱讀

在生產(chǎn)企業(yè)中，經(jīng)常會遇到產(chǎn)品、儀器的英文說明書，介紹使用方法、操作步驟、注意事項等。技術(shù)人員應(yīng)當(dāng)能夠快速閱讀英文說明書，這也是評價技術(shù)人員綜合素質(zhì)的一項標(biāo)準(zhǔn)。

下面我們通過一份JBL音箱的說明書來了解英文產(chǎn)品說明書的特點。

YourJBLPlatinumSeriesSpeakersfeaturethenewAudioZone,showninthepicture.TheAudioZoneincludes:

1.Powerswitch(backlit)—convenientlyallowsquickpowerdownwhennotinuse,ortomutethesound.Simplypushandreleasethepowerbutton—lightindicateswhenpowerison.

2.HeadphoneJack(耳機插口)—allowsyoutoconnectmoststereoheadphonesforyourpersonallisteningpleasure.

3.Audio-inport(音頻輸入端口)—anadvancedfeaturethatletsyouquicklyconnectyourfavoriteDigitalMP3playeroranyportableaudiodeviceandplayanyaudiodirectlythroughthespeakers.Simplypluginyourplayertheportandcontrolvolumefromyourplayer.

ImportantNote:Toconnectyourfavoriteportableaudiodeviceyoumustpurchaseamini-stereocable(3.5mm/3.5mmplug),availableatmostlocalelectronicsstoresandPCretailers(零售商).

說明書具有以下特點：

1．文體簡潔

ReadtheinformationifyouhavetheproblemssettingupyourHPprinter.

如果安裝惠普打印機時遇到問題，請閱讀本資料。

Selecttheprogrambythechannelselectionkeysontheremotecontrol.

通過遙控器上的選擇鍵選擇頻道。

2．操作步驟清晰、邏輯性強

ConnectyourcomputertotheInternet,andthenclick“InstallCONNECTPlayer”,andthenfollowtheon-screeninstructions.Paycloseattentiontothedisplayednotesandinstructions.

先將你的電腦連接到網(wǎng)絡(luò)，點擊“InstallConnectPlayer”，然后按照屏幕上的指示說明進行操作。密切注意所列出的事項和說明。(MP3說明書)

3．句子多使用無人稱的祈使句

KeeponpressingtheVOLUMEUPbuttonforincreaseinvolume.

連續(xù)按音量遞增按鈕，音量增大。

Soundphonenumbersautomatically.

來電自動語音播報。

4.常配以插圖直觀解釋

例如：計算機的電源接線說明如下所示：

·ConnectingthePowerCords

①Iffitted,removethelabelcoveringthecomputer’spowerconnector.

②Connectthepowercordstothedisplayandthecomputer.

③Connectthedisplay’spowercordandthecomputer’spowercordtoagroundedoutlet.

5.某些動詞使用頻率較高。

例如：place,set,insert,make,put,click,connect,avoid,push等。

Placethedisplayontopofthecomputer.

將顯示器放置于計算機上。

Pushinthepowerswitch,powerindicatorwillbeilluminated.

按下電源開關(guān)，電源指示燈將顯示發(fā)光。

Insertthebatteryholderintotheremotecontroller.

把電池座插入遙控器。

6.對可能造成產(chǎn)品損壞或安全隱患的地方都以醒目的文字或圖形提醒用戶注意。

例如：注意(Note,Caution),警告(Warning)等。

Warning：Donotremovethecover(orback);therearenouserserviceablepartsinside.

警告：請不要拆卸外殼(或后蓋)