《InputandOutput.docxVIP

INPUT AND OUTPUT（输入与输出）INPUT（输入）Input is any data or instructions used by a com-puter. Input devices translate words, images, and actions into a form a computer can process.译文：输入是用于计算机的任何数据或指令。输入设备翻译单词、图像和动作到计算机能处理的形式。Keyboards（键盘）Keyboards are the most common way to input data. The most common types are译文：键盘是最常见的输入数据的方法。最常见的键盘类型有Traditional------full-sized, rigid, rectangular.译文：传统的——完整规模、坚硬的、矩形的Flexible------roll up for easy packing.译文：灵活的——卷起，便于打包。Ergonomic------designed to minimize wrist strain.译文：人体工学的——设计于减少手腕压力。Wireless------no wire provides greater flexibility.译文：无线的——没有导线提供了更大灵活性。PDA------miniature keyboards for PDAs.译文：个人数字助理——迷你键盘的掌上电脑。Features include numeric keypads, toggle keys, and combination keys.译文：性能包括数字小键盘、切换键和组合键。Pointing Devices（指点设备）Pointing devices accept pointing gestures and convert them to machine-readable input.译文：指点设备接受指点手势和将其转换成机器可读的输入。Mouse controls a mouse pointer. A wheel button rotates to scroll through information. Three basic mouse designs are mechanical, optical, and cordless (wireless). Similar de-vices include trackball (roller ball), touch pad, and pointing stick.译文：鼠标控制鼠标指针。一个滚轮按钮旋转滚动信息。Joysticks are popular for computer games. Operations are controlled by varying pres-sure, speed, and direction.译文：摇杆是流行的电脑游戏。操作是通过改变压力、速度和方向控制。Touch screens have a clear plastic layer over crisscrossed invisible beams. Operations are controlled by finger touching the screen.译文：触摸屏有一个透明塑胶层，纵横交错看不见的光束。操作是通过手指触摸屏幕控制。Light pens are light-sensitive penlike devices. Operations are controlled by placing light pen against monitor.译文：光笔是光敏的钢笔形状的设备。操作是通过将光笔对着监视器进行控制。Stylus is a penlike device used with tablet PCs and PDAs. Handwriting recognition software translates handwritten notes.译文：手写笔是一种平板电脑和掌上电脑使用的钢笔形状的设备。手写识别软件翻译手写的笔记。Scanners（扫描仪）Scanners move across text and graphics. Scan-ning devices convert scanned text and images into a form that can be processed by the system unit.译文：扫描仪跨越文本和图形。扫描设备将扫描的文本和图像转换成一种主机可以处理的形式。Optical scanners record light, da