29.词汇：mainframe supercomputer
and the mainframe computer, a large, expensive machine with the capability of serving the needs of major business enterprises, government departments, scientific research establishments, or the like (the largest and fastest of these are called supercomputers).
以及大型机，一种大型的昂贵机器，具有满足大规模工商企业、政府部门、科研机构或者诸如此类机构需要的能力（其中体积最大、速度最快的称为巨型计算机）。
? mainframe---大型机 ? serving the needs---
? establishment建立,创办;设置；[英]研究所
30.词汇使用rather
A digital computer is not a single machine: rather, it is a system composed of five distinct elements: (1) a central processing unit; (2) input devices; (3) memory storage devices; (4) output devices; and (5) a communications network, called a bus, which links all the elements of the system and connects the system
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to the external world. 一台数字计算机不是单一的机器。确切地说，它是由5个不同的要素组成的系统：（1）中央处理器；（2）输入设备；（3）存储设备；（4）输出设备；以及（5）被称作总线的通信网络，它将系统的所有组成部分连接起来并将系统与外界连接起来。
? rather----确切地
? be composed of---contain include consist of compose a poem [a speech] 写一首诗［一篇演讲］
compose one's thoughts [passions] 镇定思绪［情绪］
Water is composed of hydrogen and oxygen. 水是由氢与氧化合而成的。
? five distinct elements--- different ? instinct n.本能 ======================== rather用法
I would rather(宁愿) you come tomorrow. 我宁愿你明天来。
He was rather(相当) tired. 他有些疲倦了。
She was no better, but rather(相反地,) grew worse.
她的病情不但没好转, 反而恶化了。 He went home very late last night, or rather(确
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切地), in the early hours this morning.
他是昨天深夜回家的, 或者更确切地说, 是今天凌晨。
========================
?rather than---与其...不如...; 宁可... 也不...
He resigned rather than take part in such a dishonest transaction .
他宁愿辞职也不愿意参加这样一种欺骗的交易。 ?other than---除了…，除…之外
There's nobody here other than me. 除了我这里没别人。
========================
31.句子结构：the software enables it to do.
Once a computer has been programmed, it can do only as much or as little as the software controlling it at any given moment enables it to do.
计算机一旦被编程，就只能做在任何特定时间控制它的软件所允许它做的事情。
? as much or as little as
? as much as多达..., 达到....那种程度 几乎等于, 和...差不多 ====================
用于强调
? I only touched it! 我只不过摸了它一下！
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? simply:
The cold was simply awful.冷得真厉害。 It is simply beautiful.这个的确是美。 very:
in the very same place就在同一个地方 ====================
? at any given moment---在任何特定时间
32.短语：a range of
Software in widespread use includes a wide range of applications programs---instructions to tell the computer how to perform various tasks. 翻译：
广泛使用的软件包括一系列各种各样的应用程序——告诉计算机如何执行各种任务的指令。
?广泛使用的--- in widespread use ?包括--- include consist of
?a wide range of applications programs 一系列各种各样的应用程序
a range of buildings一排楼房 a range of pictures一系列画片
a large range of motors for sale一长排待售的汽车
a wide range of knowledge广博的知识
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33.翻译: 同位语
Researchers are also trying to speed up circuitry functions through the use of superconductivity, the phenomenon of decreased electrical resistance observed in certain materials at very low temperatures.
研究人员也在设法利用超导性来提高电路的功能速度。超导性是在超低温条件下在某些材料中观察到的电阻减少现象。
?超导性--- superconductivity super---sub super class sub class ?speed up/slow down
?electrical resistance---电阻 ?current 水[气、电]流 ?voltage 电压，伏特数
34.分析句子结构
The \（to develop computers that can solve complex problems in ways that might eventually merit the description \） is another trend in computer development, the ideal goal being true artificial intelligence.
merit the description \ 用“创造性的”来形容名副其实 artificial intelligence---人工智能
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