2015考研英语阅读反物质研究突飞猛进
<p> <span word="Fundamental">Fundamental</span> <span word="physics">physics</span> <span word="Antimatter">Antimatter</span> <span word="of">of</span> <span word="fact">fact</span></p><p> 基础物理 反物质研究突飞猛进</p><p> <span word="Researchers">Researchers</span> <span word="at">at</span> <span word="CERN">CERN</span> <span word="have">have</span> <span word="held">held</span> <span word="on">on</span> <span word="to">to</span> <span word="anti">anti</span>-<span word="atoms">atoms</span> <span word="for">for</span> <span word="a">a</span> <span word="full">full</span> <span word="quarter">quarter</span> <span word="of">of</span> <span word="an">an</span> <span word="hour">hour</span></p><p> 欧洲核子研究中心的科研人员让反原子颗粒存在时间长达15分钟</p><p> <span word="READERS">READERS</span> <span word="who">who</span> <span word="were">were</span> <span word="paying">paying</span> <span word="attention">attention</span> <span word="in">in</span> <span word="their">their</span> <span word="maths">maths</span> <span word="classes">classes</span> <span word="may">may</span> <span word="recall">recall</span> <span word="that">that</span> <span word="quadraticequations">quadraticequations</span> <span word="often">often</span> <span word="have">have</span> <span word="two">two</span> <span word="solutions">solutions</span>, <span word="one">one</span> <span word="positive">positive</span> <span word="and">and</span> <span word="one">one</span> <span word="negative">negative</span>.</p><p> 数学课上认真听讲的读者朋友或许都能想起二次方程式通常有两个解:一个是正解,另一个是负解。</p><p> <span word="So">So</span> <span word="when">when</span>, <span word="in">in</span> 1928, <span word="a">a</span> <span word="British">British</span> <span word="physicist">physicist</span> <span word="called">called</span> <span word="Paul">Paul</span> <span word="Dirac">Dirac</span> <span word="solved">solved</span> <span word="such">such</span> <span word="an">an</span> <span word="equation">equation</span> <span word="relating">relating</span> <span word="to">to</span> <span word="theelectron">theelectron</span>, <span word="the">the</span> <span word="fact">fact</span> <span word="that">that</span> <span word="one">one</span> <span word="answer">answer</span> <span word="described">described</span> <span word="the">the</span> <span word="opposite">opposite</span> <span word="of">of</span> <span word="that">that</span> <span word="particle">particle</span> <span word="might">might</span> <span word="have">have</span> <span word="beenbrushed">beenbrushed</span> <span word="aside">aside</span> <span word="as">as</span> <span word="a">a</span> <span word="curiosity">curiosity</span>.</p><p> 因此1928年，当英国物理学家保罗狄拉克在解一道有关微观电子的类似方程时，得到了一个描述电子颗粒负状态的结果，该结果按照异常情况本应该予以舍弃，但实际情况并非如此。</p><p> <span word="But">But</span> <span word="it">it</span> <span word="wasn">wasn</span> <span word="t">t</span>. <span word="Instead">Instead</span>, <span word="Dirac">Dirac</span> <span word="interpreted">interpreted</span> <span word="it">it</span> <span word="as">as</span> <span word="antimatter">antimatter</span>-<span word="and">and</span>, <span word="four">four</span> <span word="years">years</span> <span word="later">later</span>, <span word="it">it</span> <span word="turned">turned</span> <span word="up">up</span> <span word="ina">ina</span> <span word="real">real</span> <span word="experiment">experiment</span>.</p><p> 狄拉克把这种负粒子解释为反物质，四年后，反物质在真实的实验中出现。</p><p> <span word="Since">Since</span> <span word="then">then</span> <span word="antimatter">antimatter</span>-<span word="first">first</span>, <span word="anti">anti</span>-<span word="electrons">electrons</span>, <span word="known">known</span> <span word="as">as</span> <span word="positrons">positrons</span>, <span word="and">and</span> <span word="then">then</span> <span word="antiversions">antiversions</span> <span word="of">of</span> <span word="allother">allother</span> <span word="particles">particles</span> <span word="of">of</span> <span word="matter">matter</span>-<span word="has">has</span> <span word="become">become</span> <span word="a">a</span> <span word="staple">staple</span> <span word="of">of</span> <span word="both">both</span> <span word="real">real</span> <span word="science">science</span> <span word="and">and</span> <span word="the">the</span> <span word="fictional">fictional</span> <span word="sort">sort</span>.</p>
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