PTE听力口语-Bottling the Sun’s Power on Earth

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:Bottling the Sun’s Power on Earth


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。

The military, space and aviation experts at Lockheed Martin want you to know that they’re closing in on fusion. The firm’s secretive Skunk Works has announced that its compact fusion reactor is a mere 10 years away and would investors please send money.

The device would work… if it works…by fusing atoms of hydrogen together. This fusion produces a larger atom—helium—plus copious energy. As a bonus, fusion does not produce radioactive waste, unlike its poor cousin fission that’s in use in nuclear reactors around the world today.

The key to Lockheed’s device, they say, is superconductors. They’ll create magnetic fields strong enough to contain the superhot plasma created by fusion. When the atoms of heavy hydrogen fuse in that plasma, neutrons are released that then hit the reactor wall, heating it. That heat then boils water to make steam to spin a turbine.

Or so the theory goes. Unfortunately neutrons have a nasty habit of making materials brittle, among other challenges faced by Lockheed and everyone else chasing fusion.

Of course, the world already enjoys the benefits of one fusion reactor, which sits at a comfortable remove and can be easily harnessed with a working technology called photovoltaics. It’s called the sun.

—David Biello


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