自1775年美国独立战争以来,美国经历了动荡的战争岁月。在美国内战、美西战争、美墨战争、一次大战、二次大战和让美国痛苦不已的越南战争中,无数的美国士兵流血牺牲。此后,为了纪念他们,美国国内设立了相关的战争纪念场所。在这些纪念碑、纪念馆中,有些是私人出资筹办的,有些是退伍老兵们共同募捐组建的,但大部分还是由政府建立的。今天我们要带您去的印第安纳州立博物馆就是其中之一。而它收藏的战斗自行车更是稀世珍品—— Since the American Revolutionary War in 1775, the United States has experienced turbulent years of war. During the U.S.-waged civil war, the U.S.-Spanish war, the U.S.-Mexico war, the First World War, the Second World War and the Vietnamese war that inflicted pain on the United States, numerous U.S. soldiers blew and died. Since then, to commemorate them, the United States set up a related war memorial. Some of these monuments and memorials were privately financed, some of them donated by veterans, but most were still established by the government. One of them is Indiana State Museum, which we are going to take with you today. And its collection of combat bikes is even more rare treasures -