计算机英语unit3.pptVIP

2003-8-30 /computer english Computer English Unit One Personal Computing Computer English 21.bolster 支持 22.extra-cost 额外收费 23.antique 古董，古物 Exercises In Class: Do TASK2, TASK3, TASK4, TASK5, TASK6. 3.cluster controller a device that controls a number of similar peripheral devices such as terminals and links them up to the main computer. 4.multiplexor =　multiplexer多路转接［转换］器 a device that merges information from several communications channels into one channel. It is a two-way device and is also used to separate out the combined signals into the individual channels. 5.gateway 网关 a device that links two networks in a way that is usually visible to the network users (as opposed to a bridge which is not visible). Gateways may deal with differences of protocol and naming convention when converting between the two networks. 6.data frame　数据帧 one of a number of predefined slices into which data may be broken for transmission. 5 binary code二进制码 A code that makes use of exactly two distinct characters, usually 0 and 1. 一种代码,它仅使用两种截然不同的字符,通常是0和1。 6 ASCII:美国信息交换标准码 American standard code for information interchange: a standard character encoding scheme introduced in 1963. It is a 7-bit codeallowing128 different bit patterns or characters. Exercises In Class: Translation (E) 1.对问题的实际答案是很简单的：最好的联机服务就是最满足你需要的，并且对你来说容易使用的联机服务。在审查一个联机服务时，保持头脑开放。评价时要根据它所提供的服务以及它怎样满足你的需要，而不要去比较你曾经用过的服务 2.数字传输由电子脉冲构成，把二进制代码数据表示成一系列开/关脉冲。 * * If you’d like to get further details, please visit our website: /Computer English Unit ThreeOnline Services Task 2 Terminologies and Words 1.online, on-line: 在线 used of computer services that are accessed from a terminal interactively 2.online service: 在线服务 a public database or bulletin board which can be accessed over a computer or telephone network. 3.off-line: 脱机的,离线的 describing any part of a computer system which operates independently of the central processing unit. 4.Download: 下载 send programs or data from a central computer to a remote terminal or PC. 5.