mains

名词 main:

1. any very large body of (salt) water
   同义词：main, briny
2. a principal pipe in a system that distributes water or gas or electricity or that collects sewage
   同义词：main

1. In electronics, undesirable low frequency currents interfering with a desired signal, and usually caused by a poorly screened alternating mains supply.
   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。
2. My new house is not yet connected to the mains.
   我的新房子还没接上水、 电、 煤气呢。
3. I turned the gas off at the mains before I went out.
   我出门之前，把煤气的总阀关掉了。
4. The electricity supply has been cut off/disconnected at the mains.
   电力供应已在电源处截断。