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内容简介
Unit 1 Communication Networks（通信网）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Telephone services（电话业务）
Unit 2 Transmission and Switching Technology（传输与交换技术）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Cellular Telephone Systems（蜂窝电话系统）
Unit 3 Development and Classification of Optical Fiber（光纤的发展与分类）
New Words and Phrases
Notes to the Passage
Exercise to the Passage
Reading Material Fusing Fibers（光纤的熔接过程）
Unit 4 Computer Hardware（计算机硬件）
New words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material What Is a Computer System（什么是计算机系统）
Unit 5 The Central Processing Unit（中央处理单元）
New Words Phrases and Abbreviations
Notes to the Passage
Exercise to the Passage
Reading Material Operating System（操作系统）
Unit 6 Data Transmission Media（Ⅰ）（数据传输媒介（Ⅰ））
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Modems（调制解调器）
Unit 7 Data Transmission Media（Ⅱ）（数据传输媒介（Ⅱ））
New Words and Phrases
Notes to the Passage
Exercises to the Passage
Reading Material Computer Security（计算机安全）
Unit 8 Communication Satellite Systems（卫星通信）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Bluetooth Technology（蓝牙技术）
Unit 9 Communication Facilities（通信设备）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Paging System（寻呼系统）
Unit 10 Software（软件）
New Words and Phrases
Notes to the Passage
Exercises to the Passage
Reading Material Program Development（程序的发展）
Unit 11 Data Communications（数据通信）
Notes to the Passage
New Words and Phrases
Exercises to the Passage
Reading Material Packet-switching Networks（分组交换网）
Unit 12 System 1240 Digital Exchange Architecture（S 1240数字交换结构）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Digital Switching Network（数字交换网）
Unit 13 Purpose of SONET/SDH（SONET/SDH技术）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Overview of SDH（SDH技术简介）
Unit 14 ISDN（综合业务数字网）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Function of Main Memory（主存的功能）
Unit 15 Hybrid/Fiber Coax（HFC）（混合光纤／同轴电缆接入技术）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material Video Conferencing—A Future Way of Communications（未来通信方式—视频会议）
Unit 16 LAN and WAN Internetworking（局域网和广域网）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
ReadingMaterial Types of Files（文件的分类）
Unit 17 The World Wide Web（万维网）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material The World Wide Web（万维网）
Unit 18 TCP/IP（传输控制协议／网际协议）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material E-mail（电子邮件）
Unit 19 IP Telephony（IP电话）
New Words Phrases and Abbreviations
Notes to the Passage
Exercisses to the Passage
Reading Material Web Chat（网上聊天）
Unit 20 Third-Generation Evolution（第三代移动通信的发展）
New Words Phrases and Abbreviations
Notes to the Passage
Exercises to the Passage
Reading Material ATM+MPEG2=Efficient Multimedia（ATM+MPEG2＝高效多媒体）
附录一 专业英语的翻译技巧
附录二 英语构词法
附录三 单词表
附录四 词汇短语表
附录五 缩略语表
参考文献
