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太空回收：载人飞船的再利用之道
你是否想过，每次我们看到航天员乘坐飞船升空或降落，他们所使用的飞船是不是都要被丢弃或者报废呢？如果是这样，那么太空探索岂不是一件既昂贵又浪费的事情吗？
宇宙知识探秘168/345
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