2015考研英语阅读可见光通信
<p> <span word="Visible">Visible</span>-<span word="light">light</span> <span word="communication">communication</span></p><p> 可见光通信</p><p> <span word="Tripping">Tripping</span> <span word="the">the</span> <span word="light">light</span> <span word="fantastic">fantastic</span></p><p> 与光共舞</p><p> <span word="A">A</span> <span word="fast">fast</span> <span word="and">and</span> <span word="cheap">cheap</span> <span word="optical">optical</span> <span word="version">version</span> <span word="of">of</span> <span word="Wi">Wi</span>-<span word="Fi">Fi</span> <span word="is">is</span> <span word="coming">coming</span></p><p> 一个高速而廉价的光学<span word="Wi">Wi</span>-<span word="Fi">Fi</span>即将问世</p><p> <span word="AMONG">AMONG</span> <span word="the">the</span> <span word="many">many</span> <span word="new">new</span> <span word="gadgets">gadgets</span> <span word="unveiled">unveiled</span> <span word="at">at</span> <span word="the">the</span> <span word="recent">recent</span> <span word="Consumer">Consumer</span> <span word="Electronics">Electronics</span> <span word="Show">Show</span> <span word="in">in</span> <span word="LasVegas">LasVegas</span> <span word="was">was</span> <span word="a">a</span> <span word="pair">pair</span> <span word="of">of</span> <span word="smartphones">smartphones</span> <span word="able">able</span> <span word="to">to</span> <span word="exchange">exchange</span> <span word="data">data</span> <span word="using">using</span> <span word="light">light</span>.</p><p> 最近，在拉斯维加斯国际消费电子展上首次展出的电子产品中，有一对能利用光交换数据的智能手机。</p><p> <span word="These">These</span> <span word="phones">phones</span>, <span word="as">as</span> <span word="yet">yet</span> <span word="only">only</span> <span word="prototypes">prototypes</span> <span word="from">from</span> <span word="Casio">Casio</span>, <span word="a">a</span> <span word="Japanese">Japanese</span> <span word="firm">firm</span>, <span word="transmit">transmit</span> <span word="digital">digital</span> <span word="signalsby">signalsby</span> <span word="varying">varying</span> <span word="the">the</span> <span word="intensity">intensity</span> <span word="of">of</span> <span word="the">the</span> <span word="light">light</span> <span word="given">given</span> <span word="off">off</span> <span word="from">from</span> <span word="their">their</span> <span word="screens">screens</span>.</p><p> 目前，这两部不过是日本卡西欧公司的样机，它们能通过改变自身屏幕的光强来传传输数字信号。</p><p> <span word="The">The</span> <span word="flickering">flickering</span> <span word="is">is</span> <span word="so">so</span> <span word="slight">slight</span> <span word="that">that</span> <span word="it">it</span> <span word="is">is</span> <span word="imperceptible">imperceptible</span> <span word="to">to</span> <span word="the">the</span> <span word="human">human</span> <span word="eye">eye</span>, <span word="but">but</span> <span word="the">the</span> <span word="camera">camera</span> <span word="onanother">onanother</span> <span word="phone">phone</span> <span word="can">can</span> <span word="detect">detect</span> <span word="it">it</span> <span word="at">at</span> <span word="a">a</span> <span word="distance">distance</span> <span word="of">of</span> <span word="up">up</span> <span word="to">to</span> <span word="ten">ten</span> <span word="metres">metres</span>.</p><p> 这样的闪光很微弱，人眼无法感知，但另一部手机的摄像头能够在十米的范围内检测得到。</p><p> <span word="In">In</span> <span word="an">an</span> <span word="age">age</span> <span word="of">of</span> <span word="Wi">Wi</span>-<span word="Fi">Fi</span> <span word="and">and</span> <span word="Bluetooth">Bluetooth</span>, <span word="flashing">flashing</span> <span word="lights">lights</span> <span word="might">might</span> <span word="seem">seem</span> <span word="like">like</span> <span word="going">going</span> <span word="back">back</span> <span word="to">to</span> <span word="sendingmessages">sendingmessages</span> <span word="with">with</span> <span word="an">an</span> <span word="Aldis">Aldis</span> <span word="lamp">lamp</span>.</p><p> 在这个<span word="Wi">Wi</span>-<span word="Fi">Fi</span>和蓝牙横行的时代里，使用闪光可能有点像回到用奥尔迪斯手提信号灯发送信息的年代。</p>
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