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By Robert Raffaele Washington 28 March 2008 A U.S. defense contractor unveiled an anti-missile system this week that it claims worked properly on commercial cargo planes. Such high-tech devices, in the future, could save a plane full of passengers fr
发表于:2019-01-12 / 阅读(85) / 评论(0)
VOA标准英语2008年（三月）
VOA标准英语2008年（三月）