A data processing operation in which input items or fields are distributed or duplicated in more than one output item or field. 一种数据处理操作，其中输入项或字段被分发或复制给多个输出项或字段。
A circuit with multiple inputs and one output that is energized only when a designated set of input pulses is received. 选通电极，门电路具有多个输入端和一个输出端，只有当一套指定的输入端受到脉冲时才有能量
