人的寿命是否有极限?
<p><span word="After">After</span> <span word="celebrating">celebrating</span> <span word="her">her</span> 60<span word="th">th</span> <span word="year">year</span> <span word="on">on</span> <span word="the">the</span> <span word="throne">throne</span> <span word="in">in</span> <span word="style">style</span> <span word="this">this</span> <span word="past">past</span> <span word="week">week</span>, <span word="Britain">Britain</span>'<span word="s">s</span> <span word="Queen">Queen</span> <span word="Elizabeth">Elizabeth</span> <span word="II">II</span> <span word="can">can</span> <span word="now">now</span> <span word="look">look</span> <span word="forward">forward</span> <span word="to">to</span> <span word="breaking">breaking</span> <span word="some">some</span> <span word="more">more</span> <span word="records">records</span>. <span word="She">She</span> <span word="is">is</span> <span word="already">already</span>, <span word="at">at</span> 86, <span word="Britain">Britain</span>'<span word="s">s</span> <span word="oldest">oldest</span> <span word="monarch">monarch</span> (<span word="were">were</span> <span word="she">she</span> <span word="to">to</span> <span word="die">die</span> <span word="now">now</span>, <span word="her">her</span> <span word="son">son</span> <span word="would">would</span> <span word="immediately">immediately</span> <span word="be">be</span> <span word="the">the</span> 12<span word="th">th</span> <span word="oldest">oldest</span>). <span word="On">On</span> <span word="Sept">Sept</span>. 10, 2017, <span word="she">she</span> <span word="would">would</span> <span word="pass">pass</span> <span word="Queen">Queen</span> <span word="Victoria">Victoria</span> <span word="to">to</span> <span word="become">become</span> <span word="the">the</span> <span word="longest">longest</span>-<span word="reigning">reigning</span> <span word="monarch">monarch</span> <span word="in">in</span> <span word="British">British</span> <span word="history">history</span>. <span word="To">To</span> <span word="beat">beat</span> <span word="Louis">Louis</span> <span word="XIV">XIV</span> (<span word="who">who</span> <span word="succeeded">succeeded</span> <span word="to">to</span> <span word="the">the</span> <span word="throne">throne</span> <span word="at">at</span> <span word="the">the</span> <span word="age">age</span> <span word="of">of</span> 4) <span word="for">for</span> <span word="the">the</span> <span word="longest">longest</span> <span word="reign">reign</span> <span word="in">in</span> <span word="European">European</span> <span word="history">history</span>, <span word="she">she</span> <span word="would">would</span> <span word="have">have</span> <span word="to">to</span> <span word="live">live</span> <span word="to">to</span> 98.</p><p>在风风光光庆祝完自己登基60周年后，英国女王伊丽莎白二世（<span word="Queen">Queen</span> <span word="Elizabeth">Elizabeth</span> <span word="II">II</span>）现在可以期待打破更多纪录了。86岁的她已经是英国历史上最年长的君主了（如果她现在离世，她的儿子就会立即成为第12年长的君主）。到2017年9月10日，她将会超越维多利亚女王（<span word="Queen">Queen</span> <span word="Victoria">Victoria</span>），成为英国历史上在位时间最长的君主。要打败四岁时继承王位的路易十四（<span word="Louis">Louis</span> <span word="XIV">XIV</span>）成为欧洲历史上在位时间最长的君主，她需要活到98岁。</p><p><span word="Elizabeth">Elizabeth</span> <span word="II">II</span> <span word="is">is</span> <span word="still">still</span> <span word="going">going</span> <span word="strong">strong</span>, <span word="but">but</span> <span word="the">the</span> <span word="maximum">maximum</span> <span word="human">human</span> <span word="lifespan">lifespan</span> <span word="isn">isn</span>'<span word="t">t</span> <span word="rising">rising</span> <span word="at">at</span> <span word="anything">anything</span> <span word="like">like</span> <span word="the">the</span> <span word="rate">rate</span> <span word="of">of</span> <span word="average">average</span> <span word="life">life</span> <span word="expectancy">expectancy</span>, <span word="which">which</span> <span word="is">is</span> <span word="rushing">rushing</span> <span word="upward">upward</span> <span word="globally">globally</span> <span word="at">at</span> <span word="the">the</span> <span word="rate">rate</span> <span word="of">of</span> <span word="about">about</span> <span word="three">three</span> <span word="months">months</span> <span word="a">a</span> <span word="year">year</span>, <span word="mainly">mainly</span> <span word="because">because</span> <span word="of">of</span> <span word="progress">progress</span> <span word="against">against</span> <span word="premature">premature</span> <span word="mortality">mortality</span>. <span word="Indeed">Indeed</span>, <span word="we">we</span> <span word="may">may</span> <span word="already">already</span> <span word="have">have</span> <span word="hit">hit</span> <span word="some">some</span> <span word="kind">kind</span> <span word="of">of</span> <span word="limit">limit</span> <span word="for">for</span> <span word="maximum">maximum</span> <span word="lifespan">lifespan</span> - <span word="perhaps">perhaps</span> <span word="because">because</span> <span word="natural">natural</span> <span word="selection">selection</span>, <span word="with">with</span> <span word="its">its</span> <span word="strict">strict</span> <span word="focus">focus</span> <span word="on">on</span> <span word="reproductive">reproductive</span> <span word="success">success</span>, <span word="has">has</span> <span word="no">no</span> <span word="particular">particular</span> <span word="need">need</span> <span word="to">to</span> <span word="preserve">preserve</span> <span word="genes">genes</span> <span word="that">that</span> <span word="would">would</span> <span word="keep">keep</span> <span word="us">us</span> <span word="going">going</span> <span word="to">to</span> 150.</p>
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