Cassini, humanity's first mission to orbit Saturn, currently has operations planned until 2017.
卡西尼是人类首次向土星轨道派出的使者，将在此执行任务，直到2017年。
Initial data from the spacecraft indicates it is operating as planned early in the mission.
从航空器传回的初始数据表明，目前航空器正按照先前的任务规划进行操作。
They planned very carefully how they would accomplish their mission.
他们为该如何完成任务制定了周密的计划。
Should the unprecedentedly complex mission go exactly as planned.
如果这项有史以来最复杂的任务完全依计划进行。
Should the unprecedentedly complex mission go exactly as planned.
如果这项有史以来最复杂的任务完全依计划进行。
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