你信么? 人这辈子亲密朋友只有5个！
<p><span word="You">You</span> <span word="might">might</span> <span word="not">not</span> <span word="have">have</span> <span word="as">as</span> <span word="many">many</span> <span word="close">close</span> <span word="friends">friends</span> <span word="as">as</span> <span word="you">you</span> <span word="think">think</span>. <span word="Researchers">Researchers</span> <span word="have">have</span> <span word="provided">provided</span> <span word="new">new</span> <span word="evidence">evidence</span> <span word="that">that</span> <span word="lends">lends</span> <span word="weight">weight</span> <span word="to">to</span> <span word="a">a</span> <span word="theory">theory</span> <span word="that">that</span> <span word="says">says</span> <span word="you">you</span> <span word="can">can</span> <span word="only">only</span> <span word="maintain">maintain</span> <span word="five">five</span> <span word="close">close</span> <span word="friendships">friendships</span>.</p><p>你的亲密朋友也许没有你想的那么多。研究员提供的新证据强调了一种观点，你只能维护好与5个人的亲密友谊。</p><p><span word="You">You</span>’<span word="ve">ve</span> <span word="probably">probably</span> <span word="heard">heard</span> <span word="of">of</span> <span word="Dunbar">Dunbar</span>’<span word="s">s</span> <span word="Number">Number</span> <span word="which">which</span> <span word="suggests">suggests</span> <span word="that">that</span> <span word="human">human</span> <span word="beings">beings</span> <span word="can">can</span> <span word="only">only</span> <span word="maintain">maintain</span> <span word="meaningful">meaningful</span> <span word="relationships">relationships</span> <span word="with">with</span> <span word="between">between</span> 100 <span word="to">to</span> 230 <span word="other">other</span> <span word="people">people</span>, <span word="and">and</span> <span word="that">that</span> <span word="number">number</span> <span word="is">is</span> <span word="typically">typically</span> 150.</p><p>你可能听说过邓巴数，它指出人只能与其他100~230个人维持有意义的人际关系，而且这个数字通常是150。</p>
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