科技英语课后短语

科技英语课后短语科技英语课后短语解释来源单元内序号aseriesofdigitalpulses一串数字脉冲43ashiftofacompleteperiod一个完整周期的偏移26aswitchingdevicethatconnectedlinesbetweentelphones把电话之间的线路连接起来的交换设备11abilities能力16.1Amplitude幅度22.1Analogsignal模拟信号21.1Analogsignals模拟信号21analog-to-digitalencoding模数编码41antenna天线15.1applicationlayer应用层132.4arc弧22.4asynchronoustransmission异步传输53asynchronoustransmission异步传输52.3bandwidth带宽33.2binarydigits二进制码410binarydigits二进制码43.4bit比特31.2biterrors比特错误175bitintervalandbitrate比特间隔和比特率33bitrate比特率31.4Bus总线124.2byte字节52.4caller主叫人13.2capacityofachannel信道容量33.3capacityofachannel信道容量38capacityofthetransmissionmedium传输介质的容量63carrierfrequency载频102.4CarrierSense载波侦听124.4cellulartelephony蜂窝电话101.3centralprocessingunit中央处理单元121.3centralprocessingunit(CPU)中央处理器121centralprocessingunit(CPU)中央处理器127character字符63.1characteristic特征21.4circuitswitching电路交换151.2circuitswitching电路交换151clockpulse时钟脉冲52.1codec解编码器41.4collision冲突124.3communicationbetweenthemobiletelphoneandthecelloffice移动电话和基站之间的通信107compactdiscCD光盘42Computernetwork计算机网络121.1conductorofelectricity导电性（conduction）（电导体）94congestedrouter拥塞的路由器176congestion拥塞152.4connectionstrategy连接策略124connectionlessservice无连接服务172.2Copperwire铜线11.4criticalangle临界角78current电流23.3cycle循环21.3datacommunication数据通信42.3Datalink数据链路53.3datalinklayer数据链路层58datalinklayer数据链路层131.3datalinklayer数据链路层173.4datastream数据流51.2Datagram数据报152.2datagram数据报172.1datagramandvirtualcircuit数据报和虚拟电路156dedicatedlinks专用链路151.3Demultiplexer解复用器63.4densityofmedium介质密度72digitalmeans数字手段41.2digitalprocess数字的过程62Digitalpulses数字脉冲42.1Digitalsignal数字信号31.1directcurrent直流210discreteunits离散单元152.1diskdrive磁盘驱动器122.4diskdrive磁盘驱动器128distortion失真32.4Duplexcommunication双工通信103.1electriccomputer电子计算机13.4electricalenergy电磁能量91.3electricalimpulse电脉冲11.3electricalimpulse电脉冲110Electromagneticenergy电磁能量71.1electromagneticenergy电磁能量71electromagneticsignals电磁信号27encodingtechnique编码技术33.4encodingtechnique编码技术39errorchecking差错检查177Fileserver文件服务器123.1FMfrequencymodulation调频102.2Fourieranalysis傅里叶分析28framingbits成帧比特66framingbits成帧比特63.2Frequency频率14.4frequency频率22.2Frequencyspectrum频谱33.1Frequencyspectrum频谱35full-duplexcommunication全双工通信108function功能24.3Gateway网关173.1geosynchronoussatellite地球同步卫星1111globaltransmission全球传输112.4graded-indexfiber渐变型光纤72.4ground-basedinfrastructure地面设施1110handoff切换103.4header报头133.4hierarchy（分层）体系93.2high-capacitytrunklines大容量中继线96horizontalbeam水平的光束79infinite无穷24.4Information信息41.1injectionlaserdiode注入型激光二极管713input输入62.2interference干扰102.1interferenceofadjacentcellsignals相邻蜂窝信号的相互干扰105interleaving插接62.4interleaving插接67intermediatenodes中间节点133Intermediatenodes中间节点133.1internetaddress因特网地址172.4internetworkingprotocol网间互联协议1710interval间隔31.3Invention发明91.1IP网络互联协议173.3LAN局域网15.3LAN局域网123.2Laser激光器73.2layeredframework分层的框架结构132Layeredframework分层体系131.1leasedline租用线路153.1leasedlines租用线路1510lightsource光源72.1light-emittingdiode发光二极管712light-emittingdiode发光二极管73.1limitations限制16.2limitedbandwidth有限带宽37line-of-sighttransmission视线传输111.2line-of-sighttransmission视线传输113localareanetwork局域网15localareanetwork(LAN)局域网122localexchange本地交换局92.1localexchangeoffice本地交换局95localloop本地环路92.3medium介质32.2memory存储器121.2Message消息11.1message消息41.3Microwave微波111.1microwavesignals微波信号111Mobilephone移动电话102.3mobiletelephoneswitchingoffice移动电话交换局103Mobileunit移动单元101.1monitor监视器103.2Mouse鼠标15.4MTSO移动电话交换局101.4Multicastaddresses多播地址172.3Multimode多模71.4multimodefibers多模光纤710multiplesinewaves许多个正弦波22multiplexer多路复用器65Multiplexing多路复用61.1Networklayer网络层131.4Networklayer网络层171.1networktopology网络拓扑125networktopology网络拓扑124.1networkingfunctions联网功能133.2non-conversationaltransmission非话音传输154non-voicetransmission非语音传输151.4onlineservices在线服务17opticalchannels光纤信道73opticalfiber光纤71.3opticalfiber光纤15.2opticalfibersandcoaxialcables光纤和同轴电缆18orbit轨道112.3overhead开销63.3overheadinformation开销信息69Packetswitching分组交换151.1Packetswitching分组交换152PAM脉幅调制43.1parallelmode并行模式51.3parallelmode并行模式51PCM脉码调制43.2peakcapacity峰值容量98peer-to-peerprocess对等过程135Period周期24.1periodicdigitalsignals周期性的数字信号32periodicsignal周期信号29Peripheral外设121.4permanentvirtualcircuit永久虚电路159persentationlayer表示层137personalcomputer个人计算机14.2personalcomputercommunication个人计算机通信1010phase相位22.3photosensitivecell光敏二极管711photosentivecell光敏二极管73.3physicalcharacteristics物理特征74Physicalconnection物理连接12.4physicallayer物理层131.2physicalnetwork物理网络171.3positivevoltage正电压31power功率23.4presentationlayer表示层132.3printer打印机123.4process过程61.2Process过程44.1processor处理器122.3program程序122.2propagationdelay传播时延72.2protocol协议171.2Protocol协议133.3pulseamplitudemodulation脉幅调制44pulsecodemodulation脉码调制45quantization量化43.3receiver接收器32.3receivingdevice接收器件54receptionequipment接收设备114reflectingandrefraction反射与折射77regereratedsignals再生的信号118regionalcenter大区中心97regionalcenter大区中心93.1relationship关系24.2remotecomputers远端的计算机19repeater中继器112.1route路由92.2route路由153.2Router路由器171.4sampleandhold采样和保持46sampledvalues样值44.2sampling抽样42.2samplingrate采样速率44.3satellite卫星14.3satellitecommunication卫星通信112satellitecommunicationsystems卫星通信系统12satellitecommunications卫星通信112.2sendingandreceivingdevices发送设备和接收设备64sequence序列12.1sequence序列53.4serialmode串行模式52serialmode串行模式51.4serviceprovider服务提供商101sessionlayer会话层136sessionlayer会话层132.2setupchannel建立信道109signal信号12.3Signallevel信号电平42.4Signal-to-noiseratio信噪比34.1Signal-to-noiseratio信噪比310significantbandwidth频谱36simpleoscillatingcurve简单的震荡曲线23sinewave正弦波21.2specialsecquenceof0sand1s由0和1组成的特殊码序列57speedoflight光速71.2startbit起始位53.1stationaryunit固定单元101.2step-indexfiber阶跃型光纤76Step-indexfiber阶跃型光纤72.3stopbit停止位53.2storage存储122.1switch开关62.3switchboard交换台13.1switchedvirtualcircuit交换虚电路158synchronizationbits同步比特64.1synchronizationpulses同步脉冲55synchronousTDMsystem同步时分复用系统68synchronoustransmission同步传输52.2system系统34.2TCP传输控制协议173.2TDMmultiplexing时分复用多路复用技术157Telecommunication电信61.4telegraph电报11.2telephoneline电话线34.3Telephonesystem电话系统13.3televisionantennas电视天线14telphoneconversation电话115telphonemouthpiece电话机的话筒93telphonevoiceinformation电话话音信号49temporarydedicatedlinks临时而专用的链路153terrestrialmicrowave地面微波117theabilitytocallalmostanywhereintheworld能把电话打到世界上的任何地方91theagreed-uponseriesofrulesandconventionscalledprotocols一系列被称为协议的规则和约定134thebest-effortdeliveryservice尽力而为的传递服务173theFederalCommunicationCommission联邦通信委员会13thehighestfrequencyoftheoriginalsignal原始信号中最高频率48theinterfaceofthecoreandcladding纤芯与包层的界面75theinternetaddress因特网地址174thelevelofsignal信号电平103.3TheOpenSystemsInterconnectionModel开放系统互联的模型131thesmallregionscalledcells称为蜂窝的小的区域102thetimeaxis时间轴25thetransmissioncontrolprotocol传输控制协议179thetransmittedmessage传来的消息16theunittomeasurefrequency计量频率的单位24timeslot时隙62.1time-division-multiplexing时分复用61tokenringnetwo