1、谱come into play其作用entrepreneurial企业的heuristic methods启发式方法play a role(part)起作用stem from起源于；由发生organic器官的，有机的，组织的hypothesis前提front-end前置，前级potential潜势的，潜力的intensity强度coincidence巧合，吻合，一致scalpel轻便小刀，解剖刀inventory清单，报表spherical球的，球形的distinguish区别，辨别succumb屈服，屈从，死global functional plane(GFP)全局功能平面full-dup
2、lex transmission全双工传输hologram全息照相，全息图deficiency缺乏thermonuclear热核的artifact人工制品AI(artificial intelligence)人工智能fusion熔解，熔化diskettes(also called floppy disk)软盘sector扇区entropy熵uplink上行链路arsenic砷neural network神经网络very-high-frequency(VHF)甚高频upgrade升级distortion失真，畸变identification识别，鉴定，验明pragmatic实际的implemen
3、tation实施，实现，执行，敷设entity实体，存在vector quantification矢量量化mislead使误解，给错误印象，引错vex使烦恼，使恼火defy 使落空facilitate使容易，促进retina视网膜compatible适合的，兼容的transceiver收发两用机authorize授权，委托，允许data security数据安全性data independence数据独立data management数据管理database数据库database management system(DBMS)数据库管理信息系统database transaction数据库事务
4、data integrity数据完整性，数据一致性attenuation衰减fading衰落，衰减，消失dual双的，二重的transient瞬时的deterministic宿命的，确定的algorithm算法dissipation损耗carbon碳diabetes糖尿病cumbersome讨厌的，麻烦的，笨重的razor剃刀，剃go by the name of通称，普通叫做commucation session通信会话traffic通信业务（量）synchronous transmission同步传输concurrent同时发生的，共存的simultaneous同时发生的，同时做的simu
5、ltaneous同时发生的，一齐的coaxial同轴的copper铜statistical统计的，统计学的dominate统治，支配invest in投资perspective透视，角度，远景graphics图示，图解pictorial图像的coating涂层，层deduce推理reasoning strategies推理策略inference engine推理机topology拓扑结构heterodyne外差法的peripheral外界的，外部的，周围的gateway网关hazardous危险的microwave微波（的）microprocessor微处理机，微处理器microelectro
6、nic微电子nuance微小的差别（色彩等）encompass围绕，包围，造成，设法做到maintenance维护；保持；维修satellite communication卫星通信satellite network卫星网络transceiver无线电收发信机radio-relay transmission无线电中继传输without any doubt无疑passive satellite无源卫星sparse稀少的，稀疏的downlink下行链路precursor先驱，前任visualization显像feasibility现实性，可行性linearity线性度constrain限制，约束，制
7、约considerable相当的，重要的geo-stationary相对地面静止by contrast相反，而，对比起来coorelation相关性mutual相互的mutually相互的，共同的interconnect相互连接，互连one after the other相继，依次minicomputer小型计算机protocol协议，草案protocol协议，规约，规程psycho-acoustic心理（精神）听觉的；传音的channelization信道化，通信信道选择run length encoding行程编码groom修饰，准备virtual ISDN虚拟ISDNmultitude许
8、多，大批，大量whirl旋转preference选择，喜欢avalanche雪崩pursue寻求，从事interrogation询问dumb哑的，不说话的，无声的subcategory亚类，子种类，子范畴orbital眼眶；轨道oxygen氧气，氧元素service switching and control points(SSCPs)业务交换控制点service control points(SCPs)业务控制点service control function(SCF)业务控制功能in concert一致，一齐handover移交，越区切换at a rate of以的速率in the for
9、m of以的形式base on 以为基础yttrium钇（稀有金属，符号Y）asynchronous tran.ResistorA resistor is a two-terminal electronic component that opposes an electric current by producing a voltage drop between its terminals in proportion to the current, that is ,in accordance with Ohms law :V=IR .The electrical resistance R i
10、s equal to the voltage drop V across the resistor divided by the current I through the resistor. Resistors are used as part of electrical networks and electronic circuits.电阻器是一个二端口电子元件,电阻是阻止电流流动，通过按比例产生其端子之间的电压降的电流,也就是说,根据欧姆定律:V = IR。电阻R等于电压降V除以通过电阻的电流I。电阻作为电子网络和电子电路的一部分。TransistorIn electronics, a
11、transistor is a semiconductor device commonly used to amplify or switch electronic signals . A transistor is made of a solid piece of a semiconductor material , with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistors terminals
12、changes the current flowing through another pair of terminals. Because the controlled current can be much larger than the controlling current, the transistor provides amplification of a signal. The transistor is the fundamental building block of modern electronic devices, and is used in radio, telep
13、hone, computer and other electronic systems. Some transistors are packaged individually but most are found in integrated circuits. 在电子技术中，晶体管是一种，常用来放大或进行开关控制电子信号的半导体器。晶体管是由一块固体半导体材料制成的，且至少有三个终端与外部电路连接。电压或电流适用于一双晶体管的终端改变目前流经的另一对终端。因为受控电流可以远大于控制电流，晶体管提供信号的放大。晶体管是构建现代电子设备的基本单元，并在收音机，电话，计算机和其它电子系统被使用。一些
14、晶体管被单独包装，但大多数都在集成电路中。TransformerA transformer is a device that transfers electrical energy from one circuit to anther through inductively coupled electrical conductors . A changing current in the first circuit creates a changing magnetic field; in turn, this magnetic field induces a changing voltage
15、 in the second circuit. By adding a load to the secondary circuit, one can make current flow in the transformer, thus transferring energy from one circuit to the other.变压器是一种通过感应耦合将电能从一个电路传输到另一个电路的装置。在第一电路中的一个变化的电流创建一个不断变化的磁场；反过来，这个磁场诱导第二个电路中的电压变化。通过向二次回路中增加负载，使电流在变压器中流动，从而将能量从一个电路传递到另一个电路中。RelayA r
16、elay is an electrical switch that opens and closes under the control of another electrical circuit . In the original form ,the switch is operated by an electromagnet to open or close one or many sets of contacts. It was invented by Joseph Henry in 1835. Because a relay is able to control an output c
17、ircuit of higher power than the input circuit ,it can be considered to be, in a broad sense, a form of an electrical amplifier.继电器是一种电子开关,控制另一个电路的打开和关闭。在原始形式中，该开关是由一个电磁铁操作，打开或关闭一个或多个触点。它是由约瑟夫亨利在1835年发明的。由于继电器能够控制比输入电路功率更高的输出电路，广义上说, 它可以被认为是电子放大器的一种形式。Types of circuitsIn any circuit where the only op
18、position to the flow of electrons is resistance , there is a definite relationship between the values of voltage , current, and resistance. This relationship was discovered by George Simon Ohm in 1827. It is known as Ohms law.任何电路中电阻仅仅阻止电子的流动, 电压，电流和电阻的值之间有一个明确关系。这种关系在1827年由格奥尔格西蒙欧姆发现。它被称为欧姆定律。Duali
19、tyBecause of the strong similarity between the Fourier analysis and synthesis equations in continuous time , there is a duality between the time domain and frequency domain . However , for the discrete-time Fourier transforms of aperiodic signals , no similar duality exists , since aperiodic signals
20、 and their Fourier transforms are very different kinds of functions : Aperiodic discrete-time signals are , of course, aperiodic sequences , while their Fourier transforms are always periodic functions of a continuous frequency variable .由于傅里叶分析和合成方程在在连续时间上有很大的相似性,有一个时域和频域之间的二元性。然而,对于非周期信号的离散傅里叶变换,没
21、有类似的二元性存在, 由于非周期信号和它们的傅立叶变换有着迥然不同的功能: 当然,非周期离散时间信号,非周期序列,然而他们的傅里叶变换总是周期性的频率连续变化的函数。Network Configuration Broadly speaking , there are two types of network configuration based on their layout ,peer-to-peer networks and client/server network.Peer-to-peer networks are more commonly implemented where less than ten computers are involved and where strict security is not necessary. All computers have the same status , hence the ter
