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。
The members were kept away from the world in an attempt to simulate the effects of a return voyage to Mars.
他们曾经在模拟飞往火星，再返回地球的旅程中与世隔绝。
The members were kept away from the world in an attempt to simulate the effects of a return voyage to Mars.
他们曾经在模拟飞往火星，再返回地球的旅程中与世隔绝。
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