內(nèi)燃機(jī)發(fā)出轟鳴聲, 列車(chē)員跳上車(chē)廂, 火車(chē)開(kāi)走了.The diesels roared, the conductors jumped aboard, and off the train went.工程師在設(shè)法制造一種在商業(yè)上切實(shí)可行的發(fā)動(dòng)機(jī)來(lái)取代內(nèi)燃機(jī).Engineers are still trying to come up with a commercially viable replacement for internal - c...