即将离开知乎
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http://www.esa.int/Newsroom/Press_Releases/Second_ExoMars_mission_moves_to_next_launch_opportunity_in_2020
您即将离开知乎,请注意您的帐号和财产安全。
http://www.esa.int/Newsroom/Press_Releases/Second_ExoMars_mission_moves_to_next_launch_opportunity_in_2020