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.”
Carson Schmidt and his friend spotted the man in distress after noticing a pair of skis protruding from the snow. The pair sprang into action, digging him out before he suffocated.。关于这个话题，51吃瓜提供了深入分析
，这一点在同城约会中也有详细论述
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需要索引（如算距离、下标）：栈存索引，用 nums[stack.at(-1)] 取值比较。
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