送话器电话的一个部件，它把入射的声音转化为电脉冲，并传到一个远方的接收者那里

The portion of a telephone that converts the incident sounds into electrical impulses that are conveyed to a remote receiver.

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

A circuit with multiple inputs and one output that is energized only when a designated set of input pulses is received.

三个二进制位或三个脉冲组成的一种组，通常按时间顺序出现在一根导线上或同时出现在三根导线上。

A group of three bits or three pulses, usually in sequence on one wire or simultaneously on three wires.