The main board of a computer usually containing the circuitry for the central processing unit keyboard and monitor and often having slots for accepting additional circuitry.
母板计算机的主板，通常包括为中央处理器服务的电路系统、键盘和控制器，并且通常包括为接收额外电路系统的通道。
Provide regular maintenance and service for the central processing unit, the printer, the display, the mouse, and the keyboard. Deal with the usual troubles in the computer system.
定期清理保养系统主机、打印机、显示器、鼠标、键盘，并处理系统常见故障。
All computer systems of interest to us are similar. They contain hardware components for input, central processing unit and output.
我们目前感兴趣的计算机系统都是相似的，它们的硬件设备均包含输入设备，中央处理器和输出设备。
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