n.總線；主要管道
名詞main的復(fù)數(shù)形式.
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(xué)領(lǐng)域，一種不希望發(fā)生的低頻電流，它干擾所要求的信號(hào)。通常這種現(xiàn)象是由于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(méi)接上水、 電、 煤氣呢。
I turned the gas off at the mains before I went out. 我出門之前，把煤氣的總閥關(guān)掉了。
The electricity supply has been cut off/disconnected at the mains. 電力供應(yīng)已在電源處截?cái)唷?/p>
n.剩余物；遺跡；遺體
n.主要支持
n.主帆；大桅帆
n.主要原因；主要推動(dòng)力；主發(fā)條
n.骨灰
