但是NASA的探测器，勇气号和机遇号，是我们所具有的与科幻小说上的机器人最相近的东西。
But the NASA rovers, Spirit and Opportunity, are the closest things we have to the space robots of science fiction.
美国航空航天局“勇气号”探测器登陆火星已有五年，这个六轮的地质探测机器人还有他的好兄弟“机会号”仍在继续工作。
Five years after the NASA rover Spirit landed on Mars, the six-wheeled robotic geologist and its twin Opportunity are still on the job.
美国航空航天局“勇气号”探测器登陆火星已有五年，这个六轮的地质探测机器人还有他的好兄弟“机会号”仍在继续工作。
Five years after the NASA rover Spirit landed on Mars, the six-wheeled robotic geologist and its twin Opportunity are still on the job.
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