英语词汇“third rail”是什么意思，“third rail”的读音、用法及例句翻译-烛光网

词汇	third rail
释义	third railn.（名词） The rail that supplies the high voltage to power a train on an electric railway.第三轨道：提供高电压以供给电轨上的列车能量的轨道
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