计算机中，解释并执行指令的一种功能单元。注：处理器至少包含有一个指令控制器和一个算术与逻辑运算器。
In a computer, a functional unit that interprets and executes instructions. Note: a processor consists of at least an instruction control unit and an arithmetic and logic unit.
中央处理器时间：在计算机的算术和逻辑单元里，处理一组指令所需要的实际计算时间。
CPU time: the actual computational time necessary to process a set of instructions in the arithmetic and logic units of the computer.
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