1、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 communi
2、cation12.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
3、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 t
4、he range 300 Hz to 3.4 kHz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 64 kHz重复率为 64kHz 的脉冲流10.the relationship of the true signal to the noise signal真实信号与噪声信号的关系11.the signal receiv
5、ed 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 set of pulses 将抽样的幅值转换成一串脉冲的单元16.a sequence r
6、elating 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 synchronization word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 Multip
7、lexing时分多路复用Unit2 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 seconds1
8、2.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 t
9、ransmission 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 bi
10、ts 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
11、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th
12、e 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working technology联网技术2.proprietary networking system 专用网络系统3.the International Orga
13、nization for Standardization 国际标准化组织patibility 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 hosts 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work topol
14、ogy网络拓扑work 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 de
15、stination8.（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
16、准work 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 a
17、rea 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.lo
18、cal-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work 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 computers motherboard在计算机母板上总线的扩展槽work adapter 网络适
19、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 opt
20、ical 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work administrator网络管理者7.switching of packet
21、s to the best route 交换分组到最佳路由work 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
22、 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 conversa
23、tion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work 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
24、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-mo
25、de 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 tran
26、smission长途传输2.repeater spacing 中继距离mercial 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 thres
27、hold 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 and reliability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 subscri
28、ber 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cellula
29、r 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-
30、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plicated features and functions
31、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 mobile telephone 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 i
32、ndustry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
33、线机架20.telephone company zone offices 电话公司地方局Unit 10 GSM ( Global System for Mobile Communication )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 servic
34、es8.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ha
35、ndover 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 mo
36、re 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.theore
37、tical 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 Pac
38、ket 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 technique
39、13.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 users 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 b
40、lock 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 destination addresses 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 tran
41、smission 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munication parties通信各方16.transmission unit 传输单元17.initial connection cost incurred in se
42、tting 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 rec
43、ommendation6.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 forum
44、18.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
45、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 operators and 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 tec
46、hnique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.121I121 建议18.the quality of service服务质量19.in proportion to the e
47、xact requirement与实际需求成比例20.the applications and services transported over a network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 different services协调传送不同业务的不同网络25.ess
48、ential components of future information superhighways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
49、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
