mains

常见例句

In electronics, undesirable low frequency currents interfering with a desired signal, and usually caused by a poorly screened alternating mains supply.
在電子學領域，一種不希望發生的低頻電流，它乾擾所要求的信號。通常這種現象是由於交流供電線路屏蔽不良引起的。
My new house is not yet connected to the mains.
我的新房子還沒接上水、電、煤氣呢。
I turned the gas off at the mains before I went out.
我出門之前，把煤氣的縂閥關掉了。
The electricity supply has been cut off/disconnected at the mains.
電力供應已在電源処截斷。