Railroad industry is considered as typical natural monopoly trade.铁路行业被认为是典型的自然垄断行业.Under Scott, Carnegie learned all about the railroad industry and later became a superintendent himself.为史考特工作时, 卡内基学到了所有与铁路工业有关的知识并于稍后成...

railroad industry的音标：railroad industry的英式发音音标为：['reilrəud 'indəstri]railroad industry的美式发音音标为：['relˌrod 'ɪndəstri]...

铁路工业...