其继任者,双胞胎“勇气和机遇号”比它更大(1.6米、170千克)。
Spirit and Opportunity, its twin successors, were larger, at 1.6 metres and 170kg.
2004年,两个名为“勇气号”和“机遇号”的探测器或“漫游者”被派去寻找水的迹象。
In 2004, two robot explorers, or 'rovers', called Spirit and Opportunity were sent to look for signs of water.
除了行驶速度慢(最高时速200米)和有陷入沙中的危险,勇气号与机遇号有其他缺陷。
Besides being slow (top speed 0.2kph) and at risk of sand traps, wheeled rovers like Spirit and Opportunity have other limitations.
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