US officials said there's no indication that hostile fire was involved.

美国官员表示，没有迹象表明事故涉及敌对火力。

The Abrams tanks are renowned as " hard-to-kill" battle machines due to their sophisticated composite armor, which provides formidable resistance against hostile fire.

艾布拉姆斯坦克因其复杂的复合装甲而被誉为“难以杀死” 的战斗机器，可对敌方火力提供强大的抵抗力。