电子商务英语-E-Commerce-English-PPT-课件-Unit-9.ppt

电子商务英语-E-Commerce-English-PPT-课件-Unit-9.ppt

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October4,2022,1,Unit9SearchEngine,October4,2022,2,Warm-upBackgroundInformationWordStudy&TextAnalysisExercises,October4,2022,3,Warm-upThreefamoussearchenginesareasfollows:

Whichoneofthesearchenginesimpressedyoumost?

Why?

Listothersearchengineswhichyouarefamiliarwith.,October4,2022,4,BackgroundInformationSEO（searchengineoptimization）即搜索引擎优化，主要是通过对网站的结构和内容等方面的优化，使搜索引擎更容易搜索网站的内容，并且使网站的各个网页在搜索引擎中获得较高的评分，从而获得较好的排名。

从事这方面工作的人就是searchengineoptimizer，即搜索引擎优化师。

October4,2022,5,ThelifespanofaGooglequerynormallylastslessthanhalfasecond,yetinvolvesanumberofdifferentstepsthatmustbecompletedbeforeresultscanbedeliveredtoapersonseekinginformation.Themainstepsareasfollows:

BackgroundInformation,October4,2022,6,TextAnalysisPrinciplesandOptimizationofSearchEnginePotentialcustomersfindWebsitesinmanydifferentways.Somesitevisitorsarerecommendedbyfriends,somearereferredbyotherWebsites,someseethesitesURLinaprintadvertisementorontelevision,andothersarriveaftertypingaURLthatissimilartothecompanysname.（译文）Butmanysitevisitorsareguidedtothesitebyasearchengine.,October4,2022,7,TextAnalysisPrinciplesofSearchEngineAsearchengineisaWebsitethathelpspeopletofindthingsontheWeb.Itcontainsthreemajorparts.Thefirstpart,calledaspider,acrawler,orarobot,isaprogramthatautomaticallysearchestheWebtofindWebpagesthatmightbeinterestingtopeople1.WhenthespiderfindsaWebpagethatmightinterestsearchenginesitevisitors,itcollectstheURLofthepageandsomeinformationcontainedonthepage.（译文）Theinformationmightincludethepagestitle,keywordsincludedinthepagestextandinformationaboutotherpagesonthatWebsite.,October4,2022,8,TextAnalysisThespiderreturnstheinformationtothesecondpartofthesearchenginecalledindextobestored2.TheindexcheckstoseewhethertheinformationabouttheWebpagehasalreadybeenstored.Ifithas,theindexcomparesthestoredinformationwiththenewinformationanddetermineswhethertoupdatethestoredinformationornot.Theindexisdesignedtoallowfastsearchofitslargeamountofstoredinformation.（译文）,October4,2022,9,TextAnalysisThethirdpartofthesearchengineisthesearchutility.Visitorstothesearchenginesiteprovidesearchterms,andthesearchutilitytakesthosetermsandfindsentriesforWebpagesinitsindexthatmatchthosesearchterms.（译文）ThesearchutilityisaprogramthatcreatesaWebpageofalistoflinkstoURLsfoundinitsindexthatmatchthesitevisitorssearchterms.3Thevisitorcanthenclickthelinkstovisitthosesites.,October4,2022,10,TextAnalysisSearchEngineOptimizationThecombinedtechnologyandstrategyofhavingaparticularURLlistednearthetopofsearchresultsiscalledsearchengineoptimization（SEO）.（译文）Forsitesthatobtainmostoftheirvisitorsfromsearchengines,ahighrankingwhichplacestheirURLsnearthetopofthelistoflinksreturnedbythesearchengineisextremelyimportant.ThecontentanddesignofaWebsiteareveryimportanttoSEO.Inaddition,anincreasingnumberofsearchenginesitesoffercompaniespaidpositioningwhichistheoptionofpurchasingatoplistingonsearchresultpagesforaparticularsetofsearchterms.（译文）,October4,2022,11,TextAnalysisSearchengineoptimizationisacomplexsubject.Anumberofconsultingfirmsdonothingbutadvisecompaniesonit.Plentyofbookshavebeenwrittenonthissubject,andseveralmajorconferencesaredevotedtothissubjecteachyear.（译文）,October4,2022,12,TheKeytoExercises:

Readingcomprehension1F

（2）T（3）F（4）F（5）T,October4,2022,13,TheKeytoExercises:

Readingcomprehension2,

（1）Somesitevisitorsarerecommendedbyfriends,somearereferredbyotherWebsites,someseethesitesURLinaprintadvertisementorontelevision,othersarriveaftertypingaURLthatissimilartothecompanysname.Butmanysitevisitorsareguidedtothesitebyasearchengine.

（2）Asearchenginecontainsaspider,anindexandasearchutility,October4,2022,14,TheKeytoExercises:

Readingcomprehension2（3）Theinformationmightincludethepagestitle,keywordsincludedinthepagestextandinformationaboutotherpagesonthatWebsite.（4）ThecombinedtechnologyandstrategyofhavingaparticularURLlistednearthetopofsearchresultsiscalledsearchengineoptimization.（5）Forsitesthatobtainmostoftheirvisitorsfromsearchengines,searchengineoptimizationisveryimportant.,October4,2022,15,TheKeytoExercises:

Vocabulary,A5B2C3D6E7F1G4,October4,2022,16,TheKeytoExercises:

Translation1

（1）有些访问者是朋友推荐来的，有些是其它网站推荐来的，有些是看到了印刷广告或电视上公司的网址，有些是直接输入了类似公司名称的网址找来的。

（2）当网络蜘蛛找到搜索引擎访问者可能感兴趣的内容时，它就收集页面的URL和页面上的信息。

（3）越来越多的搜索引擎网站提供付费搜索引擎排名服务，即企业购买特定关键词从而在搜索结果页面中排名靠前。

（4）有很多专门论述该专题的书，每年还有几次针对该专题而举办的大型会议。

October4,2022,17,TheKeytoExercises:

Translation2

（1）findWeb