Chinese Reading Excerpt

计算器是现代人发明的可以进行数字运算的电子机器。现代的电子计算器能进行数学运算的手持电子机器,拥有集成电路芯片,但结构比电脑简单得多,较为方便与廉价,可广泛运用于商业交易中,是必备的办公用品之一。

计算器一般由运算器、控制器、存储器、键盘、显示器、电源和一些可选外围设备及电子配件,通过人工或机器设备组成。低档计算器的运算器、控制器由数字逻辑电路实现简单的串行运算,其随机存储器只有一、二个单元,供累加存储用。高档计算器由微处理器和只读存储器实现各种复杂的运算程序,有较多的随机存储单元以存放输入程序和数据。

键盘是计算器的输入部件,一般采用接触式或传感式。为减小计算器的尺寸,一键常常有多种功能。显示器是计算器的输出部件,有发光二极管显示器或液晶显示器等。除显示计算结果外,还常有溢出指示或错误指示等。计算器电源采用交流转换器或电池,电池可用交流转换器或太阳能转换器再充电。

The calculator is an electronic machine that is invented by modern people to perform mathematical operations. Modern electronic calculators can perform the mathematical operations of handheld calculators, as they have integrated circuit chips, but the structure is simpler than a computer, is more convenient and cheap, and can be widely used in commercial transactions, making it one of the necessary office supplies.

The calculator is usually composed of an operator, a controller, a memory, a keyboard, a display, a power supply and a number of optional peripherals and electronic accessories, either manual or mechanical in composition. In low-end calculators, the digital logic circuit controller can achieve a series of simple operations, and random memory only has one or two units for cumulative storage. High-end calculators have microprocessors and read-only memory to achieve a variety of complex computing procedures, and there are more random storage units to store program inputs and data.

The keyboard is the input part of the calculator, it generally makes use of manual contact or sensors. To reduce the size of the calculator, a key often has a variety of functions. The display is the output part of the calculator, with a light-emitting diode display or a liquid crystal display. In addition to showing the results of the calculation, there are often overflow instructions or error instructions. Calculator power supply can make use of the AC converter or battery, and the battery can use the AC converter or solar converter for recharging.