LOS ANGELES -- The sophisticated grinding tool deployed by NASA's rover Opportunity was apparently no match for a chunk of martian rock.
LOS ANGELES -- The sophisticated grinding tool deployed by NASA's rover Opportunity was apparently no match for a chunk of martian rock.
洛杉矶---美国宇航局的机遇号火星车上所配置的精密磨削工具显然不适合（钻磨）火星岩石。