It was the first of several orbiters that are surveying the cold, barren landscape,looking especially for signs of water and relaying signals from the two robotic rovers crawling over the terrain.

• 这是第一个通过“火星漫游者”机器人传递信号，专门观测这颗寒冷的，荒芜的星球并且寻找水痕迹的观探卫星。