In 1941, the train would have been pulled by a steam engine.1941年，火车本可以由蒸汽机车拉动。Who invented the steam engine?谁发明了蒸汽机？Who invented the steam engine?谁发明了蒸汽机?...

steam engine的音标：steam engine的英式发音音标为：[sti:m 'endʒin]steam engine的美式发音音标为：[stim 'ɛndʒɪn]...

n.蒸汽机...