在北美铁路诞生后的前120年中,除了几千英里的电气化线路外,铁路上的主宰者一直是烧煤(有时也烧油)的蒸汽机车。自那以后,大约在十年多一点的时间里,电力传动内燃机车完全取代了蒸汽机车。内燃机车取代蒸汽机车的原因很多,其中主要是经济上的原因。例如,它可以长时间运行而很少 In the first 120 years after the North American Railway was born, in addition to thousands of miles of electrified lines, the railroad’s dominator was the coal-fired (and sometimes oil-fired) steam locomotive. Since then, about a decade or so ago, the electric drive diesel locomotive has completely replaced the steam locomotive. Diesel locomotives replace steam locomotives for many reasons, mainly for economic reasons. For example, it can run for a long time with very little