The space debris problem continues to grow as diplomats move at a snail's pace to take remedial steps. Every piece of space debris about the size of a marble is a lethal weapon, traveling with the approximate energy of a one-ton safe dropped from a five-story building. Whatever it strikes will create a new mutating, lethal debris field. NASA's David J. Kes-sler published a seminal article in 1978 in which he forecast that pinball effects created by successive collisions would eventually make low Earth orbit unsustainable for space operations.
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机译：随着外交官以蜗牛般的步伐采取补救措施，空间碎片问题继续加剧。每块类似大理石大小的太空碎片都是致命的武器，它带着从一栋五层楼高的建筑物中掉下的一吨保险柜的能量，大约在行驶。无论发生什么，都会产生一个新的变异的致命碎片场。美国宇航局的大卫·凯斯勒（David J. Kes-sler）于1978年发表了一篇开创性的文章，他预测，连续相撞产生的弹球效应最终将使低地球轨道对于太空运行而言是不可持续的。
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