The only convincing evidence for life on Mars will be when we have a microbe in the lab from a sample return mission.

火星上存在生命的唯一可信依据将会是我们实验室里有从返回任务带回的样本中提取的微生物。

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Putting aside the question of whether the redirected funds would actually be devoted to the Mars Sample Return (MSR) mission, such a reorganization would be a very bad idea.

抛开重定向的资金是否会真的被用于火星样本回收(海洋科学研究)项目，这样的重组将会是一个糟糕的主意。

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If there were organic molecules on Mars, a sample-return mission might head to the planet after all if not in 2016, then 2018 or 2020.

NEWYORKER: The Martian Chroniclers