Blue: Kinds of chain reaction "effects"
Carry propagation — threading carry information across positions
，这一点在服务器推荐中也有详细论述
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The ISS is far bigger than either the Salyuts or Skylab. In an uncontrolled deorbit, pieces of debris “up to car and train size,” say experts on the official ISS space station advisory committee, will rain down from the sky. NASA confirms this would pose “a significant risk to the public worldwide.”
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