Unit 1 Circuits and Electrical Components 1
Text A Circuits 1
Text B Electrical Components 5
Translating Skill 1 派生词的翻译（一） 9
Unit 2 Instruments for Measurement 11
Text A What Do Meters Measure? 11
Text B Oscilloscope 15
Translating Skill 2 派生词的翻译（二） 20
Unit 3 Electronic Components 21
Text A Electronic Components 21
Text B Semiconductor Diode 25
Translating Skill 3 Tele-和-Phone的译法 30
Unit 4 Integrated Circuits 33
Text A Integrated Circuits 33
Text B Application of Chips 37
Translating Skill 4 广告的翻译 41
Unit 5 Digital Logical Circuit 44
Text A Digital Logical Circuit 44
Text B Comparison of Digital and Analog Techniques 49
Translating Skill 5 专业术语翻译 52
Unit 6 Power Supply 55
Text A Power Supply 55
Text B Types of Power Supply 59
Translating Skill 6 新词的翻译 62
Unit 7 Synchronous Digital Hierarchy 65
Text A Synchronous Digital Hierarchy 65
Text B the Architecture of SDH 70
Translating Skill 7 缩略词的翻译（一） 73
Unit 8 DWDM 76
Text A DWDM 76
Text B DWDM-Wavelength Converting Transponders,Muxponder and the Reconfigurable Optical Add-Drop Multiplexer 81
Translating Skill 8 缩略词的翻译（二） 86
Unit 9 GSM 89
Text A GSM 89
Text B Cells and Modulation in GSM 93
Translating Skill 9 数量词的翻译 97
Unit 10 CDMA 100
Text A CDMA 100
Text B Spread Spectrum Characteristics of CDMA IS-95 105
Translating Skill 10 长句的翻译 108
Unit 11 3G 112
Text A IMT-2000 Global 3G Standard 112
Text B Implementation and History of 3G 116
Translating Skill 11 被动句 120
Unit 12 ADSL 123
Text A ADSL 123
Text B Application for ADSL 128
Translating Skill 12 专有名词的翻译（一） 132
Unit 13 the Wireless Web 134
Text A Second-Generation Wireless Web 134
Text B I-Mode 140
Translating Skill 13 专有名词的翻译（二） 143
Unit 14 WLAN 146
Text A Wireless LANs:802.11 146
Text B New Wireless LAN Standard 151
Translating Skill 14 否定的处理 154
Unit 15 Networks Applied Technology 157
Text A Home Networking 157
Text B E-mail 162
Translating Skill 15 And引导的句型（一） 165
Unit 16 Network Security 167
Text A Network Security 167
Text B Bluetooth Security 172
Translating Skill 16 And引导的句型（二） 175
附录1 词汇总表 177
附录2 电子信息常用缩略语 204
附录3 课文参考译文 210
附录4 练习参考答案 245
参考文献 279