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航天飞机为什么能在火焰中飞行？揭秘它的神奇“外衣”
你有没有看过航天飞机从太空返回地球的场景？它像一颗流星一样划过天空，周围冒出火花和光芒，仿佛要被烧毁。但是，它却能够安然无恙地降落在地面，这是为什么呢？
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