来自邓立虎的问题
【英语翻译Thesearethelargestandmosteffectiveclassificationyardswiththelargestshuntingcapacityofseveralthousandcarsaday.Theheartoftheseyardsisthehump:atrackonahilloverwhichthecarsarepushedbytheengineafterbein】
英语翻译
Thesearethelargestandmosteffectiveclassificationyardswiththelargestshuntingcapacityofseveralthousandcarsaday.Theheartoftheseyardsisthehump:atrackonahilloverwhichthecarsarepushedbytheengineafterbeinguncoupledjustbeforeoratthetopandthentheyroll,eitherasasinglecarsorsomecopuledcarstogether,bygravityintotheirdestinationtracksintheclassificationbowl(thetrackswherethecarsaresorted)
