给操作部件或电子器件供电的一种电力分配总线（或电缆线）。 An electric power distribution bus(or cable) that supplies functional units or electronic devices.
在电子学领域，一种不希望发生的低频电流，它干扰所要求的信号。通常这种现象是由于交流供电线路屏蔽不良引起的。 In electronics, undesirable low frequency currents interfering with a desired signal, and usually caused by a poorly screened alternating mains supply.
