电子专业英语Lesson 10 The mobile telephone system (I).ppt

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 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 , dialingA 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 or 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. 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 called 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 data 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 移动交换局 • MSC: Mobile Switching Center 移动交换中心 • PSTN: Public Switched Telephone Network 公共交换网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 •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) •1959: 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 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 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 of phone numbers. • 美国和欧洲另一个不同之处在于“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》Consequent 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 ‘‘caller 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 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 dictionary•The a。