即将离开知乎
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https://web.archive.org/web/20150111224722/http://ccar.colorado.edu/asen5050/projects/projects_2013/Johnson_Kirstyn/finalorbit.html
您即将离开知乎,请注意您的帐号和财产安全。
https://web.archive.org/web/20150111224722/http://ccar.colorado.edu/asen5050/projects/projects_2013/Johnson_Kirstyn/finalorbit.html