mars2020火星探测车被正式命名毅力号
nasa已标明mars2020探测车着陆地点着陆难度更高
mars 2020 毅力号火星车软着陆火星杰泽罗陨石坑成功
nasa announces landing site for mars 2020 rover
preferred landing site for exomars 2020 rover mission presented
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