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Martian wannabes will have to wait a little bit longer before landing on the enigmatic red planet, according to NASA. 美国国家航空航天局称，火星迷们在登上这颗神秘的红色星球前，还需要再等上一段时间。 The space agency says it's about 25 years away from sending the first human to Mars and has spelled out what it will take to make this space travel plan pan out. 该航天机构表示，将首个人类送上火星还需要大约25年的时间，并阐明了如何才能使这一太空旅行计划成功。 Scientists still have to work out major kinks -- such as deadly radiation from the cosmos, potential vision loss, and atrophying bones -- before sending a human to Mars, known for its uNPRedictable atmosphere. 科学家们在将人类送上以不可预知的大气而闻名的火星之前，还需要解决一些重大问题，比如来自宇宙的致命辐射、潜在的视力丧失和骨骼萎缩。 | 
