结合运输供给的一般概念，确定了铁路运输供给的定义。
Meanwhile, the relating factors of railway transport supply has been confirmed.
蒸汽动力和铁的结合使运输发生了革命性的变化，更加产生了更深远的影响。
Steam power and iron combined to revolutionize transport, which in turn had further implications.
新型电动引擎与人工智能和自主系统相结合，将有助于建立一个更高效、污染更少、噪音更少的综合运输系统。
New electric engines coupled with artificial intelligence and autonomous systems will contribute to a more efficient, integrated transport system that is less polluting and less noisy.
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