PTE听力口语练习-科学60秒-Earthquake Deflection

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,练习记笔记技巧和复述。废话少说,下面开始:


60秒科学:Earthquake Deflection Takes a Tiny Step

听力内容:

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。

This week a massive quake off the coast of Chile killed six and forced hundreds of thousands to evacuate in fear of a tsunami. The shaking evoked memories of the events off the coast of Japan in 2011 that triggered meltdowns at a nuclear power plant that the country is still struggling with.

Scientists have long dreamed of ways to predict and even protect regions from such devastation. Now a group of French scientists hopes to help, building on work that showed how light can be manipulated to make objects invisible.

The cloaking technique renders an object invisible by bending light of specific frequencies around the target. In theory, the same principles might be used to deflect incoming seismic waves. A precisely tuned array of boreholes around a city or a nuclear power plant that resonate at the frequencies characteristic of quakes could thus dampen the vibrations and shield objects.

The French team’s small demo with acoustic waves in soil worked, deflecting the incoming energy around the target area. That research is in the journal Physical Review Letters. [S. Brûlé, Experiments on Seismic Metamaterials: Molding Surface Waves]

Of course, that energy still has to go somewhere. Should this work pan out, the trick will be to find a way to absorb the massive energy of a major earthquake—or find a better place to send it.

—David Biello

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