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One Mars spacecraft, two senators, and a cloud of questions
美国NASA新火星轨道器采购招标背后暗藏火星样本返回任务复活之争，价值7亿美元合同引发政治与航天界关注。
"I think there's plenty of fire lit under them already."
美国NASA新火星轨道器采购招标背后暗藏火星样本返回任务复活之争，价值7亿美元合同引发政治与航天界关注。
"I think there's plenty of fire lit under them already."