PTE听力口语练习-科学60秒-Jet Pack

PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书(PLUS,Testbuilder, OG)之外,就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。墨尔本文波雅思PTE培训学校专门为墨尔本,悉尼PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture,PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。废话少说,下面开始:

Jet Pack Keeps You Grounded, but Faster


60秒科学节目(SSS)是科学美国人网站的一套广播栏目,英文名称:Scientific American – 60 Second Science,节目内容以科学报道为主,节目仅一分钟的时间,主要对当今的科学技术新发展作以简明、通俗的介绍,对于科学的发展如何影响人们的生活环境、健康状况及科学技术,提供了大量简明易懂的阐释。

Roger Bannister broke the four-minute mile barrier in 1954 with help from a couple of pacers, runners he closely followed til his final sprint. Sixty years later just about anyone could set a personal mile record°™with help from a couple of jet engines strapped to their back.

The U.S. military wanted to find a way to help soldiers hoof it through hostile territory at high speeds without getting exhausted. They turned to Arizona State University’s Human Machine Integration Laboratory. Engineers there came up with an 11-pound battery-powered backpack with two electric engines. The engines spin at about 60,000 rpm, producing about 15 pounds of instantaneous thrust.

The researchers see the backpack as an alternative to outfitting soldiers with exoskeletons, which would have to be tailored to fit the individual soldier. The same jet backpack could be worn by anyone with few adjustments.

The pack has yet to produce a sub-four-minute miler, although one runner did trim 18 seconds off his best time. Of course, that guy wasn’t running through a desert wearing 50 pounds of gear. Still, no one in a hurry would turn down a portable tailwind.

–Larry Greenemeier



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