英文：In interrupts, the setting of a mask bit to0 is called disabling an input/ output processing.
中文：在中断中, 置一个屏蔽位为0叫作输入输出处理禁止。
英文：In data processing, pertaining to data stream which flows in only one direction. For example, of a data bus, used for data transfers in only one direction.
中文：在数据处理技术中, 用于修饰单方向流动的数据流。例如, 只向一个方向传输数据的数据总线。
英文：A data processing operation in which input items or fields are distributed or duplicated in more than one output item or field.
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