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First, disconnect the boiler from the water mains.先将锅炉与供水总管断开。Make sure plugs are disconnected from the mains...确保插头与电源断开。The battery charger plugs into any mains socket.这个电池充电器可以插入任何类型的电源插座.The Auto Compact Disc Cleaner...
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n.总输电线，总管道( main的名词复数 )，干线，输电干线，（建筑物的）污水总管道...
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The capital has been without mains water since Wednesday night.从周三晚上开始，首都就停水了。He is using your mains electricity to recharge his car battery.他在用你家里的电源给他的车载蓄电池充电。They plug into the mains.它们接到了干线上。...