Cassini was on its way to Saturn.
当时卡西尼号是在前往土星的途中。
Indeed, Cassini only flies by Titan roughly every two months.
的确，卡尼西号只能大约每两个月从“泰坦”身边飞过。
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。
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。
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