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。
Host: (1) Main central processing unit in a multi-computer system. (2) holder of an online database.
主机：(1)多电脑系统中的主要中央处理机。(2)连线数据库的控制部。
Central server is deposited in computer room of class of AAA of net of domestic main force, provide a network redundant circuitry, its stability dependability is beyond question.
中心服务器存放于国内主干网AAA级机房中，并配备网络冗余线路，其稳定可靠性毋庸置疑。
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