英语翻译What is a Computer?Computers are machines that can be us

英语翻译
What is a Computer?
Computers are machines that can be used for performing calculations automatically.They can perform complex and repetitive procedures quickly,precisely and reliably and can quickly store and retrieve large amounts of data.
The physical components from which a computer is constructed (electronic circuits and input/output devices) are known as "hardware".Most computers have four types of hardware components:input,processor,storage (main memory,auxiliary storage) and output.
Input and output (I/O) devices allow the computer to communicate with the user and the outside world.The CPU (central processing unit) executes programs ("software") which tell the computer what to do.
The two principal characteristics of a computer are:It responds to a specific set of instructions in a well-defined manner.It can execute a prerecorded list of instructions (a program).
Classification of computers

What is a Computer?
什么是计算机?
Computers are machines that can be used for performing calculations automatically.They can perform complex and repetitive procedures quickly,precisely and reliably and can quickly store and retrieve large amounts of data.
计算机是可以用来自动执行计算的机器.计算机可以迅速、精确、可信地执行复杂的和重复的程序,而且可以快速存储和恢复大量的数据.
The physical components from which a computer is constructed (electronic circuits and input/output devices) are known as "hardware".Most computers have four types of hardware components:input,processor,storage (main memory,auxiliary storage) and output.
组成计算机（电子线路和输入/输出设备）的物理部分被称为“硬件”.大多数的计算机由四个部分的硬件组成：输入设备,处理器,存储器（主要用来记忆,辅助以存储）和输出设备.
Input and output (I/O) devices allow the computer to communicate with the user and the outside world.The CPU (central processing unit) executes programs ("software") which tell the computer what to do.
输入和输出(I/O)设备 使得计算机能够与用户和外界进行交流.中央处理器单元CPU用来执行指示计算机做什么的程序（“软件”）.
The two principal characteristics of a computer are:It responds to a specific set of instructions in a well-defined manner.It can execute a prerecorded list of instructions (a program).
计算机的两大主要特点是：它以设定好的方式对特定的一组指示作出反应.它可以执行一组预先存储好的只是（一个程序）.
Classification of computers
计算机的分类