Unit 1 The Principle of PCM 请将下述词组译成英文1、抽样量化与编码sampling , quantizing and coding2、话路speech channel3、幅值amplitude frequency4、抽样频率sampling frequency5、抽样速率sampling rate6、脉冲流stream of pulses7、重复率repetition rate8、编码过程coding process9、模拟信号analog signal10、传输质量transmission quality11、数字通信digital communication12、数字传输digital transmission13、含噪声的环境noisy environment14、传输路由transmission path15、信噪比Signal-to-noise ratio16、信号电平signal levels17、地面系统terrestrial system18、噪声功率noise power19、二进制传输binary transmission20、反向操作reverse operation21、8位码序列8-bit sequence22、接收端receiving terminal23、帧格式frame format24、同步字synchronization word 请将下述词组译成中文1、the schemes for performing these three functions实现这三项功能的方案2、 a series of amplitude values一串幅值3、 a speech channel of telephone quality电话质量的话路4、 a sequence of 8-binary digits一个8位二进制码的序列5、 a minimum theoretical sampling frequency理论上的最小抽样频率6、 a voice channel occupying the range 300 Hz to 3.4kHz占据着300Hz到3.4kHz频率范围的话路7、8-digits per sample value每个样值8位码8、the sparking of a car ignition system汽车点火系统的打火9、the stream of the pulses with a repetition rate of 64kHz重复率为64kHz的脉冲流10、the relationship of the true signal to the noisesignal真实信号与噪声信号的关系11、the signal received from a satellite由卫星上受到的信号12、the complete information about a particular message一条特定消息中的全部信息13、the shape of the transmitted signal被传信号的波形14、the attenuation introduced by transmission path由传输路由引入的衰减15、the unit that converts sampled amplitude value to a setof pulses将抽样的幅值转换成一串脉冲的单元16、a sequence relating to channel 1,2 and so on涉及到第一路、第二路及其他各路的序列17、a unique sequence of pulses called synchronizationword被称为同步字的独特的码序列18、terrestrial system地面系统19、the presence or absence of the pulse脉冲的“有”或“无”20、a high-speed electronic switch高速的电子开关21、the time division multiplexer时分多路复用器22、Time Division Multiplexing时分多路复用Unit 2 Asynchronous Serial Data Transmission请将下述词组译成英文1、串行接口serial interface2、显示终端CRT terminal3、发送器与接收器transmitter and receiver4、数据传输data transmission5、数据流data stream6、闲置状态the idle state7、传号电平mark level8、空号电平space level9、起始位start bit10、停止位stop bit11、T秒的持续时间duration of T seconds12、奇偶校验位parity bit13、错误标志error flag14、传输错误transmission error15、下降沿falling edge16、符号间的空格intersymbol space17、接收机的定时receiver timing18、本地时钟local clock19、磁带magnetic tape20、控制比特control bit21、逻辑1电平logical 1 level22、二进制数据binary data23、明显的缺点obvious disadvantage请将下述词组译成中文1、asynchronous serial data transmission异步串行数据传输2、the most popular serial interface最为流行的串行接口3、the transmitted data所传送的数据4、the clocks at the transmitter and receiver发送器和接收器的时钟5、the era of teleprinter电传机的时代6、the dots and dashes of a characters一个字符的点和划7、three times the duration of intersymbol space符号间空格持续时间的三倍8、the group of bits called characters被称为字符的比特组9、the invariable units comprising 7 or 8 bits of information由7或8个比特的信息组成的固定单元10、a clock generated locally by the receiver由接收机本地产生的时钟11、the received parity bit following the character在字符后接收到的奇偶校验位12、the falling edge of the start bit起始位的下降沿13、the character-oriented nature of the data link数据链路面向字符的特性Unit 3 The ISO Networking Standards请将下述词组译成英文1、联网技术networking technology2、国际标准化组织the International Organization for Standardization3、参考模型reference model4、数据分组data packets5、应用程序application program6、网络媒体network media7、分层layering8、硬件和软件hardware and software9、表示层the presentation layer10、传输层the transport layer11、数据链路层the data link layer12、网络服务network services13、文件接入file-access14、数据格式the data format15、主机host16、协议protocol17、连接connectivity18、逻辑选址logical addressing请将下述词组译成中文1、networking technology联网技术2、proprietary networking system专用网络系统3、the International Organization for Standardization国际标准化组织4、compatibility between the various types of networks各种网络之间的兼容性5、seven numbered layers七层6、standardization of network components网络部件的标准化7、error recovery纠错8、receiving host’s system接收方的主机系统9、connection-oriented circuits面向连接的电路10、information flow control信息流的控制11、network topology网络拓扑12、network media access网络媒体接入13、electrical specification电气标准14、maximum transmission distance最大传输距离Unit 4 The TCP/IP Reference Model请将下述词组译成英文1、传输控制协议transmission control protocol2、互联协议internet protocol3、数据通信data communication4、微波microwave5、高层协议higher-level protocol6、流量控制traffic control7、目的地destination8、（信）源resource9、段segment10、互联层Internet layer11、分组交换packet switching12、超文本传输协议hypertext transfer protocol13、灵活性flexibility14、数据报datagram请将下述词组译成中文1、transmission control protocol传输控制协议2、internet protocol互联协议3、satellite links卫星链路4、the standard on which the internet has grown互联网发展所基于的标准5、network access layer网络接入层6、connection-oriented protocol面向连接的协议7、file transfer protocol文件传输协议8、hypertext transfer protocol超文本传输协议9、domain name system域名系统10、developer of software软件开发人11、user datagram protocol用户数据报协议12、packet-switched technology分组交换技术Unit 5 Local-Area Networks (1)请将下述词组译成英文1、局域网local area network2、工作站workstation3、外设peripheral4、拓扑topology5、集线器hub6、交换器switch7、流量traffic8、网络接口卡network interface card9、数据库database10、印刷电路板printed circuit board11、主板motherboard12、网络适配器network adapter13、并行数据parallel data14、电脉冲electrical impulses15、中继器repeater16、联网介质networking media请将下述词组译成中文1、local-area network局域网2、logical topology逻辑拓扑3、devices that connect directly to a network segment 直接连到网络段的部件4、network interface card网络接口卡5、process of the encapsulation打包的过程6、standardized symbol标准化的符号7、printed circuit board印刷电路板8、expansion slot of a bus on a computer’s motherboard在计算机母板上总线的扩展槽9、network adapter网络适配器10、parallel signal produced by the computer由计算机产生的并行信号11、transmitting station发送站12、the specifications for Category 5 twisted-pair Ethernet五类双绞线以太网的规范Unit 6 Local-Area Networks (2)请将下述词组译成英文1、无源集线器passive hub2、网桥bridge3、可用带宽useable bandwidth4、地址表addressing table5、交换器switch6、路由器router7、光纤optical fiber8、无线介质wireless media9、铜线copper wire请将下述词组译成中文1、the device that serves as the center of a network作为网络中心的部件2、multi-port repeater多端口中继器3、reliability of the network网络的可靠性4、passive or active hubs无源或有缘的集线器5、protocol address or network address地址或网络地址6、network administrator网络管理者7、switching of packets to the best route交换分组到最佳路由8、network segment网络段Unit 7 Internet请将下述词组译成英文1、网络资源network resource2、信息服务information services3、远程终端remote terminals4、地址address5、互联的系统interconnected systems6、命令command7、电子邮件electronic mail8、主机host9、无线信道wireless channels10、搜索工具searching tools11、用户界面user interface12、拷贝copy13、互联网internet14、存取access15、文本信息textual messages16、鼠标mouse17、协议protocol18、超文本协议hypertext protocol请将下述词组译成中文1、giant network of computers located all over the world分布在全世界的计算机的巨大网络2、backbone system主干系统3、nationwide network全国范围的网络4、electronic conference电子会议5、remote terminal远程终端6、live conversation实时的对话7、world wide web万维网8、searching tool搜索工具9、the largest repository of information最大的信息库10、network facilities resources网络设备资源11、the vast majority of the computers on the net在网上的绝大多数计算机12、the Unix operating systemUnix 操作系统13、textual messages文本信息14、 a way to move data between the internet and your PC 在因特网和你的PC机之间传送数据方法15、the convenient searching tools方便的搜索工具16、the networked hypertext protocol联网的超文本协议Unit 8 Introduction to Optical Fiber Communication 请将下述词组译成英文1、光纤通信optical fiber communications2、光源light source3、波长wavelength4、激光器laser5、色散dispersion6、传输介质transmission medium7、多模光纤multi-mode fiber8、长途干线long-haul trunks9、单模光纤single-mode fiber10、带宽bandwidth11、宽带用户wideband subscriber12、纤维光学fiber-optics13、商用技术commercial technology14、门限电流threshold current15、光检测器photodetector16、波分复用wavelength multiplexing17、纤维光网络fiber-optic networks18、视频带宽video bandwidth请将下述词组译成中文1、long distance transmission长途传输2、repeater spacing中继距离3、commercial technology商用技术4、optical fiber communications光纤通信5、the total length of installed fiber已装光纤的总长度6、long-haul telecommunication system长途通信系统7、the low-loss silica fiber低衰减的石英纤维8、fibers with losses approaching the Rayleigh limit衰减逼近瑞利极限的光纤9、room temperature threshold currents温室下的门限电流10、the longer wavelength region较长波长区11、subscriber access project用户接入工程12、improvements in component performance andreliability部件性能和可靠性的改进13、data rates for installed fiber optic system已安装的光纤系统的数据速率14、gigabit per second range每秒吉比特15、wavelength multiplexing波分复用16、wideband subscriber loop system宽带用户环路系统17、multifiber connectors多纤连接器18、projected lifetime设计寿命19、light source光源20、single-mode fiber单模光纤21、distributed-feedback laser分布反馈式激光器22、information capacity信息容量23、switching hierarchy交换体系24、broadband services宽带业务Unit 9 Cellular Mobile Telephone System请将下述词组译成英文1、蜂窝式移动电话cellular mobile telephone2、服务性能service performance3、频谱frequency spectrum4、频带frequency band5、微处理器microprocessor6、移动手机mobile unit7、广播业务broadcast service8、天线antenna9、子系统subsystems10、移动用户mobile subscriber11、服务能力service capability12、服务性能service performance13、利用率utilization14、带宽bandwidth15、单边带single-sideband16、扩频spread spectrum17、大规模集成电路large scale integrated circuits18、蜂窝点cellular site19、蜂窝交换机cellular switch20、无线机架radio cabinet21、呼叫处理call processing22、服务区service area请将下述词组译成中文1、frequency spectrum utilization频谱利用率2、the limited assigned frequency band有限的指定频带3、complicated features and functions复杂的特性和功能4、large-scale integrated circuit technology大规模集成电路技术5、developmental cellular system实验性的蜂窝系统6、central coordinating element中央协调单元7、cellular administration蜂窝管理8、operational limitation of conventional mobiletelephone system传统移动电话的运行限制9、limited service capability有限的服务能力10、radio communication industry无线通信行业11、available radio frequency spectrum可用的无线电频谱12、the allocated frequency band所分配的频带13、mobile transceiver移动收发信机14、technological feasibility技术上的可行性15、severe spectrum limitations严厉的频谱限制16、FM broadcasting service调频广播业务17、propagation path loss传播路径衰耗18、multipath fading多径衰耗19、radio cabinet无线机架20、telephone company zone offices电话公司地方局Unit 10 GSM ( Global System for MobileCommunication )请将下述词组译成英文1、个人通信personal communcations2、通信标准communication standards3、固定电话业务fixed telephone service4、网络容量network capacity5、移动交换中心mobile switching center6、国际漫游international raoming7、宽带业务broadband services8、接口转换interface conversion9、频谱分配frequency allocation10、模拟方式analogue mode11、蜂窝通信原理cellular communication principle12、拥塞jamming13、蜂窝裂变cell splitting14、基站base station15、寄存器register16、收费功能billing function17、接入方法access method18、突发脉冲传输方式burst transmission mode19、开销信息overhead information20、切换算法handover algorithms21、短消息服务short message service22、技术规范technical specification请将下述词组译成中文1、total access communication system全接入的通信系统2、global mobile communication system全球移动通信系统3、time division multiple access时分多址4、facsimile and short message service传真和短信息服务5、fixed communication networks固定通信网络6、 a more personalized system更个人化的系统7、the cost and quality of the link链路的价格与质量8、market growth市场的发展9、fixed telephone service固定电话业务10、coaxial cable同轴电缆11、interface conversion接口转换12、cellular communication principle蜂窝通信原理13、frequency reuse and cell splitting频率再用和蜂窝裂变14、cochannel interference共信道干扰15、theoretical spectral capability理论上的频谱容量16、micro-cellular system微蜂窝系统17、base station transceiver基站收发信机18、subscriber register用户寄存器19、burst transmission mode突发脉冲传输模式20、overhead information开销信息21、advanced handover algorithms先进的切换算法22、the GSM technical specificationsGSM的技术规范Unit 11 Circuit Switching and Packet Switching请将下述词组译成英文1、电路交换circuit switching2、分组交换packet switching3、报文交换message switching4、子网subnet5、信头header6、目的地址destination address7、误差控制error control8、存储转发方式store-and-forward manner9、突发性bursty10、传输时延transmission delay11、中间交换设备intermediate switching equipment12、交换技术switching technique13、返回信号return signal14、报文处理机message processor15、给定最大长度given maximum length16、信息转移information transfer17、随机性random18、专用电路dedicated circuit19、电路利用率channel utilization请将下述词组译成中文1、the capability of storing or manipulating user’s data存储和处理用户数据的能力2、the special signaling message特定的信令信息3、 a well defined block of data called a message被精心定义的称为报文的数据块4、the information regarding the source and destinationaddresses涉及源和目的地址的信息5、the computer referred to as a message processor叫做报文处理器的计算机6、the store-and-forward transmission technique存储转发传输技术7、the dynamic allocation of the bandwidth宽带的动态分配8、the overall transmission delay of the message报文整个的传输时延9、switching technique交换技术10、circuit switching电路交换11、message switching报文交换12、packet switching分组交换13、total path of connected lines连线的整个通路14、source-destination pair源到目的地的一对15、communication parties通信各方16、transmission unit传输单元17、initial connection cost incurred in setting up the circuit在建立电路时产生的起初连接成本18、low delay constraint required by the user用户所需的短时延的限制19、the fixed dedicated end-to-end circuit固定专用的端到端电路20、low channel utilization低的电路利用率Unit 12 ATM请将下述词组译成英文1、异步转移模式asynchronous transfer mode2、逻辑信道logical channel3、虚电路virtual circuits4、虚路径virtual path5、建议recommendation6、网络层network level7、业务与应用层service and application level8、虚连接virtual connection9、信息高速公路information superhighway10、点播电视video-on-demand11、统计复用statistical multiplexing12、数字化的信息digital information13、标识符identifier14、协议protocols15、网络节点network node16、宽带网broadband network17、ATM论坛ATM forum18、面向未来的future-proofed19、图像编码image encoding20、虚拟专用网virtual private network21、数据处理data processing请将下述词组译成中文1、short packets called cells被叫做信元的短的分组2、bit rates of several hundred megabits a second每秒几百兆比特的速率3、unique multiplexing method独特的复用方法4、the physical connection between any two terminals任何两个终端之间的物理连接5、interactive video services交互式的视频业务6、 a nature vehicle for multimedia services多媒体业务的自然载体7、the current and future requirements of both operatorsand users运营者和用户当期和未来的要求8、the technique for switching high bit rate channel高比特率信道的交换技术9、asynchronous transfer mode异步转移模式10、multiplexing and switching technique复用和交换技术11、the underlying type of transmission所承载的传输类型12、dual identification双重标识13、virtual circuit虚电路14、virtual path虚路径15、the transfer of cells to the network nodes信元在网络节点上的转移16、hundreds megabits a second每秒几百兆比特17、recommendation I.121I．121建议18、the quality of service服务质量19、in proportion to the exact requirement与实际需求成比例20、the applications and services transported over anetwork网络所传送的应用和业务21、the ability to construct virtual networks构成虚网络的能力22、cost-effective use of infrastructure低价高效的利用网络设施23、future-proofed面向未来的24、coordinating different networks carrying differentservices协调传送不同业务的不同网络25、essential components of future informationsuperhighways未来的信息高速公路的基本部件26、statistical multiplexing统计复用27、optimum use of resources资源的最佳使用28、virtual private networks虚拟专用网Unit 13 The Public Telecommunications Network请将下述词组译成英文1、公众电信网public telecommunication network2、本地环路local loop3、交换节点switching node4、双绞线twisted pair5、外部呼叫external call6、端局end office7、数字数据系统digital data systems8、二线连接two wire connection9、收费中心toll center10、电路交换网circuit-switched network11、电话用户telephone subscriber12、数据流量data traffic13、链路link14、中继线trunk15、半双工的half-duplex16、全双工的full-duplex17、中间交换节点intermediate switching node18、音频电路voice-frequency circuit19、汇接交换机tandem switch20、外部呼叫external call21、拓扑topology22、节点间的internode23、路由route请将下述词组译成中文1、full-duplex connection全双工的连接2、the function of concentrating traffic集中话务量的功能3、the switching nodes called tandem switches被称为汇接局的交换节点4、 a fraction of subscribers一小部分用户5、the interface between the station and the network在站和网络之间的接口6、the subscriber that transmit digital signal发送数字信号的用户7、national networks国家网络8、architectural components结构部件9、local loop本地环路10、the branches between nodes节点间的支路11、twisted pair双绞线12、full duplex全双工的13、intermediate switching nodes中间交换节点14、tree topology树状拓扑15、transmission facilities传输设备16、multiple voice-frequency circuits多条音频电路17、synchronous TDM同步时分复用18、adjacent end offices相邻的端局19、full connectivity全连通性20、isolated subnetworks被分离开的子网21、high-usage trunks高效中继线22、basic order of selection路由选择的基本次序23、backbone hierarchical network主干体系网络24、two subscribers attached to different end offices连到不同端局的两个用户25、exchange area交换区Unit 14 Integrated Services Digital Network请将下述词组译成英文1、全球通信global communication2、灵活性flexibility3、端到端的数字连接end-to-end digital connectivity4、开放网络open network5、语声编码voice encoding6、综合业务数字网integrated services digital network7、系统结构infrastructure8、全球通信global communication9、国际标准化组织International Organization for Standardization10、通信载体communication carriers11、传输媒质transmission medium12、接口设备interface equipment13、宽带限制bandwidth limitation14、交换设备switching equipment15、语音编码voice encoding16、脉码调制pulse code modulation17、基本接入basic access请将下述词组译成中文1、the integrated services digital network综合业务数字网2、the International Organization for Standardization国际标准化组织3、degradation due to the transmission medium由于传输媒质导致的质量下降4、bandwidth limitations inherent in a 4 kHz voicechannel4kHz话路中所固有的带宽限制5、standardized ports标准化的接口6、pulse code modulation脉码调制7、digital communication数字通信8、ISDN standards and system architectureISDN的标准和系统结构9、global communications全球通信10、progressive application of digital technology数字技术的逐步应用11、public communication carriers公共通信载体12、enhanced quality高质量13、substantial quantity of interface equipment 大量的接口设备14、flexibility in the transmission of voice, data, video andother services在传送话音、数据、视频和其他业务上的灵活性15、bandwidth limitations带宽的限制16、end-to-end digital connectivity端到端的数字连接17、voice encoding techniques语音编码技术18、pulse coding modulation脉码调制19、basic access signaling rate基本接入信令速率20、universal access统一的接入21、experimental technology实验性的技术Unit 15 Current Situation and the Future in theTelecommunication World请将下述词组译成英文1、X.25协议X.25 protocol2、电视信号television signals3、窄带业务narrowband services4、基本接入basic access5、电信业务teleservice6、用户电报telex7、无线电波radio waves8、地面天线ground antenna9、同轴的coaxial10、直接广播系统direct broadcast system11、端到端的时延end-to-end delay12、抖动jitter13、繁忙小时peak hours14、芯片技术chip technology15、高清晰度电视high definition television16、运行与维护operations and maintenance请将下述词组译成中文1、the existing public network现有的公用网络2、classical two-way voice conversation传统的双向对话3、packet switched data network based on X.25 protocols基于X.25协议的分组交换数据网络4、the user access to the network对网络的用户接入5、 a circuit switched service with a channel rate of 70Mbit/s信道速率为70Mbit/s的电路交换业务6、the service-independent network与业务无关的网络7、the optimal statistical sharing of the resources对资源的最佳统计复用8、telecommunication service电信业务9、telex network用户电报网10、messages of characters文字报11、two-way voice conversation双向对话12、X.21 protocolsX.21协议13、ground antenna地面天线14、coaxial tree network同轴树状网络15、community antenna TV network公用天线的电视网络16、direct broadcast system直接广播系统17、Ethernet以太网18、token bus and token ring network令牌总线网和令牌环网19、end-to-end delay端到端的时延20、world-wide independent networks全球范围的独立网络21、the peak hours in the telephone network电话网络的繁忙小时22、resource pooling资源共享23、peak hour traffic繁忙小时流量24、integration of narrow-band services窄带业务的综合25、the progress in speech coding and chip technology 在语声编码和芯片技术方面的进步26、 a new teleservice新的电信业务27、adapting to new service requirements对新业务要求的适配28、optimal statistical sharing of the resources资源最佳统计式的共享。