NASA计划25年内将人类送上火星
<p><span word="Martian">Martian</span> <span word="wannabes">wannabes</span> <span word="will">will</span> <span word="have">have</span> <span word="to">to</span> <span word="wait">wait</span> <span word="a">a</span> <span word="little">little</span> <span word="bit">bit</span> <span word="longer">longer</span> <span word="before">before</span> <span word="landing">landing</span> <span word="on">on</span> <span word="the">the</span> <span word="enigmatic">enigmatic</span> <span word="red">red</span> <span word="planet">planet</span>, <span word="according">according</span> <span word="to">to</span> <span word="NASA">NASA</span>.</p><p>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。</p><p><span word="The">The</span> <span word="space">space</span> <span word="agency">agency</span> <span word="says">says</span> <span word="it">it</span>'<span word="s">s</span> <span word="about">about</span> 25 <span word="years">years</span> <span word="away">away</span> <span word="from">from</span> <span word="sending">sending</span> <span word="the">the</span> <span word="first">first</span> <span word="human">human</span> <span word="to">to</span> <span word="Mars">Mars</span> <span word="and">and</span> <span word="has">has</span> <span word="spelled">spelled</span> <span word="out">out</span> <span word="what">what</span> <span word="it">it</span> <span word="will">will</span> <span word="take">take</span> <span word="to">to</span> <span word="make">make</span> <span word="this">this</span> <span word="space">space</span> <span word="travel">travel</span> <span word="plan">plan</span> <span word="pan">pan</span> <span word="out">out</span>.</p><p>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。</p><p><span word="Scientists">Scientists</span> <span word="still">still</span> <span word="have">have</span> <span word="to">to</span> <span word="work">work</span> <span word="out">out</span> <span word="major">major</span> <span word="kinks">kinks</span> -- <span word="such">such</span> <span word="as">as</span> <span word="deadly">deadly</span> <span word="radiation">radiation</span> <span word="from">from</span> <span word="the">the</span> <span word="cosmos">cosmos</span>, <span word="potential">potential</span> <span word="vision">vision</span> <span word="loss">loss</span>, <span word="and">and</span> <span word="atrophying">atrophying</span> <span word="bones">bones</span> -- <span word="before">before</span> <span word="sending">sending</span> <span word="a">a</span> <span word="human">human</span> <span word="to">to</span> <span word="Mars">Mars</span>, <span word="known">known</span> <span word="for">for</span> <span word="its">its</span> <span word="uNPRedictable">uNPRedictable</span> <span word="atmosphere">atmosphere</span>.</p><p>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。</p>
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