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美国空军计划在2000年试飞一种经过改装的波音-747喷气式飞机。这种飞机上载有激光武器，能够摧毁250英里高空的飞毛腿弹道导弹。五角大楼负责人说，这种机械激光可能成为摧毁升空导弹的最有效的方法。它能够使敌军导弹弹头落在美国阵地之外。这种机械激光取得了两个技术性突破
The U.S. Air Force plans to test a modified Boeing-747 jet aircraft in 2000. The aircraft carries a laser weapon that can destroy 250-mile-high Scud-ballistic missiles. The Pentagon official said the mechanical laser could be the most effective way to destroy a miss-missile. It enables enemy missile launchers to fall outside the United States. This mechanical laser made two technical breakthroughs