古代奥林匹克运动会期间有这样的传统,在奥运会进行期间,所有交战方都要放下武器,以实现和平竞赛的目的。战争、恐怖事件、爆炸、赛场倒塌、地震等不可预见灾难是重大体育赛事的大敌。为了确保绝对安全,多年来,各主办国总是小心翼翼地加以防范。2012年伦敦奥运会临近,通过对世界重 During the period of the ancient Olympic Games, there was such a tradition that during the Olympic Games, all warring parties should lay down their arms in order to achieve the goal of peaceful competition. Unforeseen disasters such as war, terrorist attacks, explosions, stadium collapses, earthquakes and other unforeseen disasters are major enemies of major sporting events. In order to ensure absolute security, host countries have always been careful to guard against them over the years. London 2012 Olympic Games approaching, by the world