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.

 
  • 這是第一個(gè)通過(guò)“火星漫游者”機器人傳遞信號,專(zhuān)門(mén)觀(guān)測這顆寒冷的,荒蕪的星球并且尋找水痕跡的觀(guān)探衛星。
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