举世闻名的美国战略防御倡议(SDI)计划问世已经六年多了。对一项重大的战略武器研究发展计划来说,六年时间不算长,然而在这短暂期间该计划的经历都是变化频繁、坎坷曲折的。今天,该计划正徘徊在十字路口:是部署一种初步系统,还是照原计划前进?回顾它的历程,展望它的可能前景,对回答这个问题和了解这项计划或许是有益的。 The world-famous U.S. Strategic Defense Initiative (SDI) program has been around for more than six years. For a major strategic arms research and development program, six years are not long, but during the short period of time the experience of the program has been changing rapidly and with twists and turns. Today, the plan is hovering at a crossroad: whether to deploy an initial system or to move forward as planned? To review its course and look into its possible prospects, it may be useful to answer that question and understand the plan.