n. train-mile
... trainman 机车司机 trainmaster 车务段长 train-mile 列车行驶英里 ...
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大多数人没有发现，在列车行驶的前10几英里，车的发动机是插在安装在铁路线的太阳能源头上。
Most were unaware that for the first dozen miles or so, the train's engines were plugged into the solar energy source fitted along the line.
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