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1、Unit 4 Electronic systemsLesson 10 The Mobile TelephoneSystem (I)电子信息工程专业英语教程任治刚 主编 电子工业出版社Date1电子信息工程专业英语教程Lesson 10 The Mobile Telephone System (I) Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniquesDate2电子信息工程专业英语教程 Terminology cordless phone base station, mobile
2、 station dial tone, dialing antenna packet-switching MTSO, MSC, PSTN The History of Mobile Radio CommunicationBackgroundsDate3电子信息工程专业英语教程Terminology Date4电子信息工程专业英语教程cordless phone 无绳电话Date5电子信息工程专业英语教程base station, mobile station base station 基站 mobile station 移动站Date6电子信息工程专业英语教程Dial tone , diali
3、ngA dial is A graduated surface or face on which a measurement, such as speed, is indicated by a moving needle or pointer. 标度盘 The face of a clock. 钟表针盘 A sundial. 日晷 The panel or face on a radio or television receiver on which the frequencies or channels are indicated. 调谐度盘 A movable control knob o
4、r other device on a radio or television receiver used to change the frequency. 调谐钮 A rotatable disk on a telephone with numbers and letters, used to signal the number to which a call is made. 电话拨号盘Date7电子信息工程专业英语教程Antenna 天线 A metallic apparatus for sending or receiving electromagnetic waves. also c
5、alled aerialDate8电子信息工程专业英语教程packet-switching 包交换，分组交换 A packet is A sequence of binary digits including data and call control signals that is switched as a composite whole. The data, call control signals, and possibly error control information, are arranged in a specific format.A short block of dat
6、a of fixed length and destination information. It is the unit in which information (a message) is transferred in a packet-switching network. Packets may consist of as many as 8000 bits, and more from node to node in the network.Date9电子信息工程专业英语教程 MTSO: Mobile Telephone Switching Office 移动电话交换局 MSC: M
7、obile Switching Center 移动交换中心 PSTN: Public Switched Telephone Network 公共交换电话网MTSO, MSC, PSTNDate10电子信息工程专业英语教程The History of Mobile Radio CommunicationDate11电子信息工程专业英语教程1880: Hertz Initial demonstration of practical radio communication 1897: Marconi Radio transmission to a tugboat over an 18 mi path
8、 1921: Detroit Police Department: - Police car radio dispatch (2 MHz frequency band) 1933: FCC (Federal Communications Commission) Authorized four channels in the 30 to 40 MHz range 1938: FCC Ruled for regular service 1946: Bell Telephone Laboratories 152 MHz (Simplex) 1956: FCC 450 MHz (Simplex) 19
9、59: Bell Telephone Laboratories Suggested 32 MHz band for high capacity mobile radio communication 1964: FCC 152 MHz (Full Duplex) 1964: Bell Telephone Laboratories Active research at 800 MHz 1969: FCC 450 MHz (Full Duplex)Date12电子信息工程专业英语教程1974: FCC 40 MHz bandwidth allocation in the 800 to 900 MHz
10、 range 1981: FCC Release of cellular land mobile phone service in the 40 MHz bandwidth in the 800 to 900 MHz range for commercial operation 1981: AT not arrogant or prideful. 谦逊的，谦卑的 Showing deferential or submissive respect 低声下气的，顺服的 a humble apology. Low in rank, quality, or station; unpretentious
11、 or lowly 卑微的，朴实 的 a humble cottage. To curtail or destroy the pride of; humiliate. 贬抑，使惭愧 To cause to be meek or modest in spirit. 使柔顺，使谦和 To give a lower condition or station to; abase. 压低，降低Date26电子信息工程专业英语教程Humble in text A second area where the U.S. and Europe differed is in the humble matter o
12、f phone numbers. 美国和欧洲另一个不同之处在于“电话号码”这件小事 上。 Date27电子信息工程专业英语教程Humble in use humble lowly meek humble指“对自己或自己的地位、成就等表现得谦卑的 ”, 但现在主要指“自感低卑的” Defeat and failure make people humble. lowly 为较文雅的用语, 指“谦逊”, 但很少用以形容人 He had a lowly heart. meek 指“性情的温顺的”、“屈从他人的行为或意见” be as meek as a lambDate28电子信息工程专业英语教程Co
13、nsequent in dictionary Following as a natural effect, result, or conclusion: 随之发生的 tried to prevent an oil spill and the consequent damage to wildlife. Following as a logical conclusion. 必然的 Logically correct or consistent. 合乎逻辑的Date29电子信息工程专业英语教程Consequent in text Consequently, the usual rule of ca
14、ller pays also applies to mobile phones in Europe (except for international calls where costs are split). 这样，“主叫付费” 的常规也可以应用于欧洲的移动电 话（费用分开的国际电话除外）。 Date30电子信息工程专业英语教程Consequent in use be consequent on /upon 因.而引起的， 随.而发生的， 是.的后果 the confusion consequent on the earthquakeDate31电子信息工程专业英语教程Install in
15、dictionary To set in position and connect or adjust for use: 安装 installed the new furnace. To induct into an office, a rank, or a position: 任命 a ceremony to install the new governor. To settle in an indicated place or condition; establish: 安顿 installed myself in the spare room.Date32电子信息工程专业英语教程Install in text Such systems, known as push-to-talk systems, were installed in several cities beginning in the late 1950s. 20世纪50年代末，有几个城市开始架设这样的系统（ 被称之为“按下通话系统”) Date33电子信息工程专业英语教程Interference in dictionaryThe act or an instance of h
