GRE阅读练习：从木筏比赛到三维压制技术.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：从木筏比赛到三维压制技术 GRE阅读训练：GRE阅读练习：从木筏比赛到三维压制技术 GRE考试精品课程指导  EVERY summer, Seattle holds a raft race in Green Lake, a park that is the eponymous home of the water the rafts must cross.  每年夏天，西雅图都会在绿湖举行一场木筏比赛，参加比赛的木筏必须渡过这个湖，这里的公园因其湖水而闻名。  Entries for the Milk Carton Derby have to be made from old plastic milk bottles.  参加这场同城牛奶盒比赛的木筏必须是由旧的塑料牛奶盒制成。  The result is a wonderfully Heath-Robinson collection of improvised craft.  结果，你就会看到一场奇妙的希思-鲁宾逊简易工艺展。  But this year one stood out: the entry from the University of Washingtons engineering department actually looked like a boat.  但是今年，有一个参赛的木筏特别引人注目：这个木筏是华盛顿大学工程系做的，看起来真的像一只船。  The students who built it, Matthew Rogge, Bethany Weeks and Brandon Bowman, had shredded and melted their bottles, and then used a 3D printer to print themselves a plastic vessel.  制造这个木筏的学生—马修罗格、伯斯尼威克斯和布兰登伯曼，把他们收集的塑料盒切碎后再熔化，再使用一种三维压印技术压印成一种塑料容器。  No doubt the Milk-Carton-Derby rules will be tightened next year—though in the end, the team came only second.  毫无疑问的是，同城牛奶盒比赛的规则明年会更加严格—虽然最后，这个队只赢得了第二名。  But they did come first in a competition that mattered more.  但是，他们在比赛中首次出现的意义却更重大。  On October 19th they won $100,000 in the 3D4D Challenge, organised by a charity called techfortrade.  在10月19日，他们在由一个称为技术为了贸易更美好的慈善组织组织的三维-四维挑战赛中赢得了十万美元的奖金。  3D printing is all the rage at the moment.  三维压印目前正是风靡一时。  Several varieties of the technique exist, using a wide range of materials as the ink.  利用几种不同的现有技术，再加上大范围的原料—称之为墨水就可以操作了。  One of the most popular methods, though—and the one used by the team—works by extruding a filament of molten plastic.  尽管，最流利的一种方式—就是那个参加比赛的队伍使用的，只是挤压成一条熔化后的塑料细丝。  In the case of the teams printer, this plastic was high-density polyethylene from milk bottles.  就这个参赛队伍的印刷技术来说，这种塑料是由牛奶盒提炼出的高密度聚乙烯。  The print head makes repeated passes over the thing being printed, leaving a plastic t