一个叫做“火星社会”的宇宙鼓吹团体已经进行了一系列模拟火星访问的任务，包括一个80人的沙漠站点和另一个12人的更偏远的北极基地。
The Mars Society, a space-advocacy group, has conducted a series of simulated Mars missions involving 80 crews at a desert station and a dozen crews at an even more remote Arctic base.
周一，两名同外部世界隔离了8个月之久的志愿者在模拟火星上迈出了第一步，进而让这个关于火星旅行的实验到达了关键性的中间点。
Two volunteers cut off from the rest world for eight months stepped out on a mock-up of Mars on Monday, reaching the dramatic half-way point of their experimental "voyage" to the Red Planet.
即将成为宇航员的六人将于这周开始进行长达520天的模仿火星任务的模拟太空航行。他们将如何应付巨大的心理压力呢？
Six would-be astronauts will this week begin a 520-day mock space voyage to simulate a mission to Mars. How will they cope with the huge psychological pressures?
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