新发现：新冠病毒可能已经在人类中传播多年
<p><span word="As">As</span> <span word="COVID">COVID</span>-19 <span word="has">has</span> <span word="hitchhiked">hitchhiked</span> <span word="around">around</span> <span word="the">the</span> <span word="globe">globe</span>, <span word="causing">causing</span> <span word="lockdowns">lockdowns</span>, <span word="pneumonia">pneumonia</span> <span word="and">and</span> <span word="fear">fear</span>, <span word="scientists">scientists</span> <span word="have">have</span> <span word="been">been</span> <span word="racing">racing</span> <span word="to">to</span> <span word="determine">determine</span> <span word="where">where</span> <span word="the">the</span> <span word="SARS">SARS</span>-<span word="CoV">CoV</span>-2 <span word="coronavirus">coronavirus</span> <span word="has">has</span> <span word="come">come</span> <span word="from">from</span>.</p><p>新冠病毒在全球传播，导致多地封城，并引发了肺炎和恐慌，科学家们一直在努力确定新冠病毒的来源。</p><p><span word="While">While</span> <span word="we">we</span> <span word="don">don</span>'<span word="t">t</span> <span word="have">have</span> <span word="all">all</span> <span word="the">the</span> <span word="answers">answers</span> <span word="yet">yet</span> - <span word="including">including</span> <span word="whether">whether</span> <span word="it">it</span> <span word="came">came</span> <span word="from">from</span> <span word="an">an</span> <span word="animal">animal</span> <span word="reservoir">reservoir</span> - <span word="a">a</span> <span word="new">new</span> <span word="analysis">analysis</span> <span word="has">has</span> <span word="definitively">definitively</span> <span word="put">put</span> <span word="to">to</span> <span word="rest">rest</span> <span word="the">the</span> <span word="conspiracies">conspiracies</span> <span word="that">that</span> <span word="claim">claim</span> <span word="it">it</span>'<span word="s">s</span> <span word="a">a</span> <span word="lab">lab</span>-<span word="made">made</span> <span word="disease">disease</span>.</p><p>虽然我们还没有弄清所有问题，如病毒是否来自动物宿主，但新的分析结果的确终结了病毒来自于实验室的说法。</p><p><span word="The">The</span> <span word="study">study</span> <span word="raises">raises</span> <span word="some">some</span> <span word="interesting">interesting</span> <span word="possibilities">possibilities</span> <span word="regarding">regarding</span> <span word="the">the</span> <span word="origin">origin</span> <span word="of">of</span> <span word="the">the</span> <span word="new">new</span> <span word="coronavirus">coronavirus</span>. <span word="One">One</span> <span word="of">of</span> <span word="the">the</span> <span word="scenarios">scenarios</span> <span word="suggests">suggests</span> <span word="the">the</span> <span word="virus">virus</span> <span word="may">may</span> <span word="have">have</span> <span word="been">been</span> <span word="circulating">circulating</span> <span word="harmlessly">harmlessly</span> <span word="in">in</span> <span word="human">human</span> <span word="populations">populations</span> <span word="for">for</span> <span word="quite">quite</span> <span word="a">a</span> <span word="while">while</span> <span word="before">before</span> <span word="it">it</span> <span word="became">became</span> <span word="the">the</span> <span word="pandemic">pandemic</span> <span word="that">that</span>'<span word="s">s</span> <span word="now">now</span> <span word="stopped">stopped</span> <span word="the">the</span> <span word="world">world</span> <span word="in">in</span> <span word="its">its</span> <span word="tracks">tracks</span>.</p><p>这项研究针对新冠病毒的来源提出了几种有趣的可能性。其中一种设想是病毒可能已经在人类中无害传播了很久，然后才发展成了疫情，导致世界停滞不前。</p><p>"<span word="It">It</span> <span word="is">is</span> <span word="possible">possible</span> <span word="that">that</span> <span word="a">a</span> <span word="progenitor">progenitor</span> <span word="of">of</span> <span word="SARS">SARS</span>-<span word="CoV">CoV</span>-2 <span word="jumped">jumped</span> <span word="into">into</span> <span word="humans">humans</span>, <span word="acquiring">acquiring</span> [<span word="new">new</span> <span word="genomic">genomic</span> <span word="features">features</span>] <span word="through">through</span> <span word="adaptation">adaptation</span> <span word="during">during</span> <span word="undetected">undetected</span> <span word="human">human</span>-<span word="to">to</span>-<span word="human">human</span> <span word="transmission">transmission</span>," <span word="the">the</span> <span word="team">team</span> <span word="from">from</span> <span word="the">the</span> <span word="US">US</span>, <span word="UK">UK</span> <span word="and">and</span> <span word="Australia">Australia</span> <span word="writes">writes</span> <span word="in">in</span> <span word="the">the</span> <span word="study">study</span>.</p><p>这个来自美国、英国和澳大利亚的团队在研究中写道：“可能最初的新冠病毒进入人体以后，在未被发现的人际传播中为了适应人体环境获得了‘新的基因组特征’。”</p>
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