11岁小女孩成顶尖科学家 她的发明造福世界
<p><span word="A">A</span> <span word="schoolgirl">schoolgirl</span> <span word="aged">aged</span> 11 <span word="has">has</span> <span word="been">been</span> <span word="honoured">honoured</span> <span word="as">as</span> "<span word="America">America</span>'<span word="s">s</span> <span word="top">top</span> <span word="young">young</span> <span word="scientist">scientist</span>" <span word="for">for</span> <span word="inventing">inventing</span> <span word="a">a</span> <span word="quick">quick</span>, <span word="low">low</span>-<span word="cost">cost</span> <span word="test">test</span> <span word="to">to</span> <span word="detect">detect</span> <span word="lead">lead</span>-<span word="contaminated">contaminated</span> <span word="water">water</span>.</p><p>一名11岁的女学生因发明了一个快速、廉价测试铅污染水的方法，而被誉为“美国顶尖青年科学家”。</p><p><span word="Gitanjali">Gitanjali</span> <span word="Rao">Rao</span> <span word="was">was</span> <span word="selected">selected</span> <span word="from">from</span> 10 <span word="finalists">finalists</span> <span word="who">who</span> <span word="had">had</span> <span word="spent">spent</span> <span word="three">three</span> <span word="months">months</span> <span word="collaborating">collaborating</span> <span word="with">with</span> <span word="scientists">scientists</span> <span word="to">to</span> <span word="develop">develop</span> <span word="their">their</span> <span word="ideas">ideas</span>.</p><p><span word="Gitanjali">Gitanjali</span> <span word="Rao">Rao</span>是从10名参加决赛的选手们中被选出来的，他们花了三个月的时间与科学家们进行合作，来实现自己的想法。</p><p><span word="Her">Her</span> <span word="device">device</span> <span word="uses">uses</span> <span word="carbon">carbon</span> <span word="nanotubes">nanotubes</span> <span word="to">to</span> <span word="detect">detect</span> <span word="the">the</span> <span word="presence">presence</span> <span word="of">of</span> <span word="lead">lead</span>. <span word="Thousands">Thousands</span> <span word="of">of</span> <span word="US">US</span> <span word="water">water</span> <span word="systems">systems</span> <span word="are">are</span> <span word="reportedly">reportedly</span> <span word="contaminated">contaminated</span> <span word="by">by</span> <span word="lead">lead</span>.</p><p>她的设备使用了碳纳米管来检测铅的存在。据报道，数千个美国供水系统都有铅污染的问题。</p>
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