知识介绍：个人计算机的奇妙结构-The Wonderful Structure .

个人计算机的奇妙结构
【内容提示】
学校要出壁报，约你用英语写一篇介绍个人计算机的文章。内容包括：
①计算机的工作过程与人的大脑的思维过程相似，所以又叫电脑。
②从外观看，个人计算机有三部分：主机、键盘和显示器。
③从计算机的工作过程看，计算机系统是由软件和硬件组成的。硬件好比人的躯体，软件好比人的灵魂。
④控制计算机的技术叫做软件，计算机及其各种设备本身叫做硬件。
⑤计算机的工作就是通过其软件，利用计算机的各种资源，指挥硬件实现无所不能的奇妙用途。
【作文示范】
The Wonderful Structure of a Personal Computer
In Chinese, a computer is popularly known as an “electrical brain”, for the working process of a computer is similar to a human brain very much.
In appearance, a personal computer has three simple and clear parts: the main frame①, the keyboard② and the display③. In other words, if you own these three parts, you would exactly have a computer.
A computer system is made up of software and hardware considering its working manner. If we compare the hardware to a human body, then, the software would be the soul.
Just as a driver cannot drive a car without driving skills or the car it self, you cannot control a computer without controlling techniques or the computer itself. The controlling techniques are called software, while computers themselves and related devices④ such as a mouse⑤ are called hardware.
The work of a computer is just making full use of various resources by a software set in the computer, and directing the hardware to realize marvelous omnipotent⑥ functions.
【词语解释】
①main frame 主机（箱）
②keyboard[＇ki:b&:d]n．键盘
③display 显示器
④related devices 相关部件
⑤mouse 鼠标
⑥omnipotent[&m＇nip+t+nt]a．无所不能的
【写法指要】
1）本文是知识介绍说明文，或构造介绍说明文。文章主要介绍了计算机结构的简单知识，顺便提及了它的功能。在正文里，作者采用空间顺序写法，由外部结构写到内部结构。最后用类比法（analogy）将计算机操作同驾驶汽车作了比较。
2）类比法是一种逻辑推理方法，人们在文章中经常用到。英语中表达类比的方式有多种，本文用到的有“be similar to”，“compare…to…”，“just as”等。但是，类比法有或然性，须慎用。