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https://www.theguardian.com/science/2018/mar/06/chinas-tiangong-1-space-station-will-crash-to-earth-within-weeks#comments
您即将离开知乎,请注意您的帐号和财产安全。
https://www.theguardian.com/science/2018/mar/06/chinas-tiangong-1-space-station-will-crash-to-earth-within-weeks#comments