HorizongoesbehindthescenesatNASAastheycountdowntothelandingofa2.5billion-dollarroveronthesurfaceofMars.Insixdaystime,thenuclear-poweredvehicle-thesizeofacar-willbewincheddownontothesurfaceoftheRedPlanetfromarocket-poweredcrane.That'sifthingsgoaccordingtoplan:MarshasbecomeknownastheBermudaTriangleofs…详情
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