GRE阅读练习：超级计算机速度与性能之战.docxVIP

Word文档下载后（可任意编辑） 第 第 PAGE 1 页 共 NUMPAGES 1 页 GRE阅读练习：超级计算机速度与性能之战 GRE阅读训练：GRE阅读练习：超级计算机速度与性能之战 GRE考试精品课程指导  SPEED fanatics that they are, computer nerds like to check the website of Top500, a collaboration between German and American computer scientists that keeps tabs on which of the worlds supercomputers is the fastest.  作为速度控，电脑迷们喜欢查看Top500的网站，该网站是由德国和美国的计算机科学家合办，记录世界上最快的超级计算机。  On November the website released its latest list, and unveiled a new champion.  11月，该网站发布了必威体育精装版榜单，揭开了新一任冠军的面纱。  The computer in question is called Titan, and it lives at Oak Ridge National Laboratory, in Tennessee.  获得冠军的计算机名为泰坦，居于田纳西州的橡树岭国家实验室，  It took first place from another American machine, IBMs Sequoia, which is housed at Lawrence Livermore National Laboratory, in California.  它是击败了另一台美国的计算机-IBM的红杉而取得冠军的，红杉位于加利福尼亚州的劳伦斯利物莫国家实验室。  These two machines have helped reassert Americas dominance of a list that had, in the past few years, been headed by computers from China and Japan.  这两台计算机使美国重新在Top500榜单上获得优势地位，而在过去数年，中国和日本的计算机一直雄踞榜首。  Titan is different from the previous champion in several ways.  泰坦与之前的冠军在多个方面均有所不同。  For one thing, it is an open system, meaning that scientific researchers with sufficiently thorny problems will be able to bid for time on it, in much the same way that astronomers can bid for time on telescopes.  其一，它是一个开放的系统，意味着科研人员可以争取泰坦的使用时间来解决非常棘手的问题，与天文学家争取天文望远镜使用时间的方式差不多。  Sequoia, by contrast, spends most of its time running hush-hush simulations of exploding nuclear weapons, and is therefore rarely available for public use.  相比之下，红杉将其大多数时间用在绝密的核武器爆炸模拟上，因此很少用于公共用途。  Titan has an unusual design, too.  泰坦的设计也与众不同。  All supercomputers are composed of thousands of processor chips harnessed together.  所有的超级计算机是由成千上万个处理芯片连在一起组成的。  Often, these are derivatives of the central processing units, or CPUs, that sit at the heart of modern, desktop machines.  这些芯片通常都是由现代台式电脑的心脏-中央处理