It is an unusual sight to behold: Freight trains zipping through Europe, across country borders - and over myriad rail voltages and national train systems.
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- 这样的情形可不一般:货运列车在欧洲大陆蜿蜒前行,越过一道道国境线,自由地穿越在众多电压等级和各国的铁路系统之间。