SincethetimewhentheR的精选

问题详情：SincethetimewhentheRomansfirstsettledontheDanubeRiverandbuiltoneoftheirmostimportantcentralEuropeanforts(堡垒),Vindobona,thecitywenowknowasVienna,hasplayedaveryimportantroleinEuropeanhistory.A...