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.
一种能传输信号的信道或导线。
A channel or conductor capable of transmitting signals.
由两根外皮绝缘的导线扭在一起组成的一种类型的传输媒体，扭在一起是为提高对可能破坏被传输信号的其它（杂散）电信号的抗扰度。
A type of transmission medium consisting of two insulated wire twisted together to improve its immunity to interference from other(stray) electrical signals that may otherwise corrupt the signal being transmitted.
单线的仅有或用一根丝，例如纤维或导线
Having or using only one filament, such as a thread or wire.
