新研究指出 人的寿命可能没有上限!
<p><span word="New">New</span> <span word="research">research</span> <span word="has">has</span> <span word="revived">revived</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="longest">longest</span> <span word="standing">standing</span>, <span word="and">and</span> <span word="biologically">biologically</span> <span word="fundamental">fundamental</span>, <span word="debates">debates</span> <span word="in">in</span> <span word="the">the</span> <span word="life">life</span> <span word="sciences">sciences</span>: <span word="Is">Is</span> <span word="there">there</span> <span word="a">a</span> <span word="set">set</span> <span word="limit">limit</span> <span word="to">to</span> <span word="how">how</span> <span word="long">long</span> <span word="humans">humans</span> <span word="can">can</span> <span word="live">live</span>?</p><p>一项新研究激起了一个老生常谈的基本生物学话题，也是生命科学领域的一个重要争议，那就是：人的寿命到底有没有上限？</p><p><span word="The">The</span> <span word="study">study</span>, <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Science">Science</span>, <span word="suggests">suggests</span> <span word="that">that</span> <span word="maybe">maybe</span> <span word="there">there</span> <span word="isn">isn</span>'<span word="t">t</span>. (<span word="It">It</span> <span word="should">should</span> <span word="be">be</span> <span word="noted">noted</span> <span word="that">that</span> <span word="this">this</span> <span word="finding">finding</span> <span word="contradicts">contradicts</span> <span word="other">other</span>, <span word="similar">similar</span> <span word="research">research</span> <span word="by">by</span> <span word="biologists">biologists</span> <span word="and">and</span> <span word="demographers">demographers</span>, <span word="as">as</span> <span word="Nature">Nature</span> <span word="notes">notes</span>.)</p><p>这份研究报告发表在《科学》杂志上，意指人的寿命并没有上限。（《自然》杂志指出，这一发现与其他生物和人口统计学家作类似研究后的发现相矛盾。）</p><p><span word="Researchers">Researchers</span> <span word="examined">examined</span> <span word="a">a</span> <span word="population">population</span> <span word="of">of</span> <span word="nearly">nearly</span> 4,000 <span word="Italians">Italians</span> <span word="who">who</span> <span word="were">were</span> 105 <span word="years">years</span> <span word="or">or</span> <span word="older">older</span>. <span word="What">What</span> <span word="they">they</span> <span word="found">found</span> <span word="was">was</span> <span word="that">that</span> <span word="mortality">mortality</span> <span word="risk">risk</span> <span word="essentially">essentially</span> <span word="plateaus">plateaus</span> <span word="after">after</span> <span word="a">a</span> <span word="certain">certain</span> <span word="point">point</span> <span word="for">for</span> <span word="these">these</span> "<span word="super">super</span>-<span word="elderly">elderly</span>" <span word="individuals">individuals</span>.</p><p>研究团队考查了大约4000名105岁及以上的高龄意大利人，他们发现在这些“超级年长”的人群中，过了某一节点后死亡风险反而趋于平缓。</p>
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