《计算机专业英语》电子教程8

计算机专业英语1-490Chapter1Chapter1Chapter1Chapter1TheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersKeypoints:Keypoints:Keypoints:Keypoints:Keypoints:Keypoints:Keypoints:Keypoints:uusefultermsanddefinitionssefultermsanddefinitionsofofDatabaseManagementDatabaseManagementDifficultpoints:Difficultpoints:Difficultpoints:Difficultpoints:Difficultpoints:Difficultpoints:Difficultpoints:Difficultpoints:CCCCCCCClassificationlassificationofofthelogicalthelogicalstructuringtechniquesofDBMSstructuringtechniquesofDBMS计算机专业英语1-491Chapter1Chapter1Chapter1Chapter1TheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersRequirements:Requirements:Requirements:Requirements:Requirements:Requirements:Requirements:Requirements:1.Principleofeasiestpenetration1.Principleofeasiestpenetration1.Principleofeasiestpenetration1.Principleofeasiestpenetration2.Thekindsofcomputersecuritybreaches2.Thekindsofcomputersecuritybreaches2.Thekindsofcomputersecuritybreaches2.Thekindsofcomputersecuritybreaches3.Whatisfirewall3.Whatisfirewall3.Whatisfirewall3.Whatisfirewall4.4.4.4.了解了解了解了解英文摘要的写作技巧计算机专业英语1-492Chapter1Chapter1Chapter1Chapter1TheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersNewWords&Expressions:NewWords&Expressions:NewWords&Expressions:NewWords&Expressions:facilitatefacilitatefacilitatefacilitate使容易，促进使容易，促进使容易，促进使容易，促进retrievaln.retrievaln.retrievaln.retrievaln.检索检索检索检索fieldn.fieldn.fieldn.fieldn.字段，字段，字段，字段，recordrecordrecordrecord记录，记录，记录，记录，alphabeticallyalphabeticallyalphabeticallyalphabetically按字母顺序地按字母顺序地按字母顺序地按字母顺序地chronologicallychronologicallychronologicallychronologically按年代顺序排按年代顺序排按年代顺序排按年代顺序排breakdownv.breakdownv.breakdownv.breakdownv.分解分解分解分解buildupbuildupbuildupbuildup建造，装配，组成建造，装配，组成建造，装配，组成建造，装配，组成encyclopedian.encyclopedian.encyclopedian.encyclopedian.百科全书百科全书百科全书百科全书referencen.referencen.referencen.referencen.涉及，参考，引用涉及，参考，引用涉及，参考，引用涉及，参考，引用bibliographybibliographybibliographybibliography书目，参考书目书目，参考书目书目，参考书目书目，参考书目periodicaln.periodicaln.periodicaln.periodicaln.期刊，杂志期刊，杂志期刊，杂志期刊，杂志literaturen.literaturen.literaturen.literaturen.文献，著作文献，著作文献，著作文献，著作professionaln.professionaln.professionaln.professionaln.专业人员，专家专业人员，专家专业人员，专家专业人员，专家11.1OverviewAbbreviations:Abbreviations:Abbreviations:Abbreviations:计算机专业英语1-493Chapter1Chapter1Chapter1Chapter1TheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersTheHistoryandFutureofComputersAdatabaseconsistsofafileorasetoffiles.TheinformationinthesefilesAdatabaseconsistsofafileorasetoffiles.TheinformationinthesefilesAdatabaseconsistsofafileorasetoffiles.TheinformationinthesefilesAdatabaseconsistsofafileorasetoffiles.Theinformationinthesefilesmaybebrokendownintorecords,eachofwhichconsistsofoneormoremaybebrokendownintorecords,eachofwhichconsistsofoneormoremaybebrokendownintorecords,eachofwhichconsistsofoneormoremaybebrokendownintorecords,eachofwhichconsistsofoneormorefields.Fieldsarethebasicunitsofdatastorage,andeachfieldtypicallyfields.Fieldsarethebasicunitsofdatastorage,andeachfieldtypicallyfields.Fieldsarethebasicunitsofdatastorage,andeachfieldtypicallyfields.Fieldsarethebasicunitsofdatastorage,andeachfieldtypicallycontainsinformationpertainingtooneaspectorattributeoftheentitycontainsinformationpertainingtooneaspectorattributeoftheentitycontainsinformationpertainingtooneaspectorattributeoftheentitycontainsinformationpertainingtooneaspectorattributeoftheentitydescribedbythedatabase.Usingkeywordsandvarioussortingcommands,describedbythedatabase.Usingkeywordsandvarioussortingcommands,describedbythedatabase.Usingkeywordsandvarioussortingcommands,describedbythedatabase.Usingkeywordsandvarioussortingcommands,userscanrapidlysearch,rearrange,group,andselectthefieldsinmanyuserscanrapidlysearch,rearrange,group,andselectthefieldsinmanyuserscanrapidlysearch,rearrange,group,andselectthefieldsinmanyuserscanrapidlysearch,rearrange,group,andselectthefieldsinmanyrecordstoretrieveorcreatereportsonparticularaggregatesofdata.recordstoretrieveorcreatereportsonparticularaggregatesofdata.recordstoretrieveorcreatereportsonparticularaggregatesofdata.recordstoretrieveorcreatereportsonparticularaggregatesofdata.一个数据库由一个文件或文件集合组成。这些文件中的信息可分解成一个一个数据库由一个文件或文件集合组成。这些文件中的信息可分解成一个一个数据库由一个文件或文件集合组成。这些文件中的信息可分解成一个一个数据库由一个文件或文件集合组成。这些文件中的信息可分解成一个个记录，每个记录有一个或多个域。域是数据存储的基本单位，每个域一个记录，每个记录有一个或多个域。域是数据存储的基本单位，每个域一个记录，每个记录有一个或多个域。域是数据存储的基本单位，每个域一个记录，每个记录有一个或多个域。域是数据存储的基本单位，每个域一般含有由数据库描述的属于实体的一个方面或一个特性的信息。用户使用般含有由数据库描述的属于实体的一个方面或一个特性的信息。用户使用般含有由数据库描述的属于实体的一个方面或一个特性的信息。用户使用般含有由数据库描述的属于实体的一个方面或一个特性的信息。用户使用键盘和各种排序命令，能够快速查找、重排、分组并在查找的许多记录中键盘和各种排序命令，能够快速查找、重排、分组并在查找的许多记录中键盘和各种排序命令，能够快速查找、重排、分组并在查找的许多记录中键盘和各种排序命令，能够快速查找、重排、分组并在查找的许多记录中选择相应的域，建立特定集上的报表。选择相应的域，建立特定集上的报表。选择相应的域，建立特定集上的报表。选择相应的域，建立特定集上的报表。11.1Overview计算机专业英语1-494Chapter1Chapter1Chapter1Chapter1TheHistoryandFutureofComputersTheHistoryandFu