单身狗怨谁？都是基因惹的祸
<p><span word="If">If</span> <span word="it">it</span> <span word="seems">seems</span> <span word="you">you</span> <span word="are">are</span> <span word="permanently">permanently</span> <span word="single">single</span> <span word="while">while</span> <span word="everyone">everyone</span> <span word="else">else</span> <span word="around">around</span> <span word="you">you</span> <span word="is">is</span> <span word="in">in</span> <span word="a">a</span> <span word="relationship">relationship</span>, <span word="blame">blame</span> <span word="your">your</span> <span word="DNA">DNA</span>.</p><p>如果你发现身边的人都成双成对而就你是长时间的单身狗，那么都是你的<span word="DNA">DNA</span>惹的祸。</p><p><span word="Scientists">Scientists</span> <span word="have">have</span> <span word="identified">identified</span> <span word="a">a</span> ‘<span word="singleton">singleton</span> <span word="gene">gene</span>’, <span word="and">and</span> <span word="found">found</span> <span word="that">that</span> <span word="those">those</span> <span word="who">who</span> <span word="have">have</span> <span word="it">it</span> <span word="are">are</span> 20 <span word="per">per</span> <span word="cent">cent</span> <span word="more">more</span> <span word="likely">likely</span> <span word="to">to</span> <span word="be">be</span> <span word="single">single</span> <span word="than">than</span> <span word="others">others</span>.</p><p>科学家们发现了一种“单身基因”并发现，带有这种基因的人比其他人单身的几率高20%。</p><p><span word="It">It</span> <span word="is">is</span> <span word="thought">thought</span> <span word="that">that</span> <span word="by">by</span> <span word="lowering">lowering</span> <span word="levels">levels</span> <span word="of">of</span> <span word="the">the</span> <span word="feel">feel</span>-<span word="good">good</span> <span word="brain">brain</span> <span word="chemical">chemical</span> <span word="serotonin">serotonin</span>, <span word="the">the</span> <span word="gene">gene</span> <span word="makes">makes</span> <span word="people">people</span> <span word="less">less</span> <span word="comfortable">comfortable</span> <span word="in">in</span> <span word="close">close</span> <span word="relationships">relationships</span>.</p><p>研究发现基因控制大脑中使人感觉良好的血清素分泌下降，使得人们在亲密的关系中变得拘谨。</p><p><span word="This">This</span> <span word="could">could</span> <span word="make">make</span> <span word="it">it</span> <span word="harder">harder</span> <span word="to">to</span> <span word="form">form</span> <span word="them">them</span> <span word="in">in</span> <span word="the">the</span> <span word="first">first</span> <span word="place">place</span> - <span word="or">or</span> <span word="lead">lead</span> <span word="to">to</span> <span word="break">break</span>-<span word="up">up</span> <span word="after">after</span> <span word="break">break</span>-<span word="up">up</span>.</p><p>这使得他们最初就不太容易开始一段感情——或者在分手之后再经历分手。</p><p><span word="The">The</span> <span word="scientists">scientists</span> <span word="from">from</span> <span word="Peking">Peking</span> <span word="University">University</span> <span word="in">in</span> <span word="Beijing">Beijing</span> <span word="tested">tested</span> <span word="hair">hair</span> <span word="samples">samples</span> <span word="from">from</span> <span word="almost">almost</span> 600 <span word="Chinese">Chinese</span> <span word="university">university</span> <span word="students">students</span> <span word="to">to</span> <span word="analyse">analyse</span> <span word="a">a</span> <span word="gene">gene</span> <span word="called">called</span> 5-<span word="HTA">HTA</span>1, <span word="which">which</span> <span word="comes">comes</span> <span word="in">in</span> <span word="two">two</span> <span word="different">different</span> <span word="versions">versions</span>.</p><p>北京大学的科学家从600名中国大学生的头发样本中分析了这种名为5-<span word="HTA">HTA</span>1的基因，发现基因有两种不同的版本。</p><p><span word="Those">Those</span> <span word="with">with</span> <span word="the">the</span> ‘<span word="G">G</span>’ <span word="version">version</span> <span word="were">were</span> <span word="much">much</span> <span word="more">more</span> <span word="likely">likely</span> <span word="to">to</span> <span word="be">be</span> <span word="single">single</span> <span word="than">than</span> <span word="those">those</span> <span word="with">with</span> <span word="the">the</span> ‘<span word="C">C</span>’ <span word="version">version</span>.</p>
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