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：Future Smog Looks More Persistent
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。
Polluted air causes more than 2.6 million people to die prematurely each year. And when the smog builds up in Los Angeles or Beijing it sits there until a cleansing rain or a clearing wind freshens the air.
So what does the future hold for the number of days in which the air is not fair? According to some new computer model simulations, nothing good. The atmosphere is going to get more stagnant thanks to increasing levels of greenhouse gases and the heat they trap, leading to as many as 40 more bad air days annually around much of the globe.
That’s according to a study in the journal Nature Climate Change. [Daniel E. Horton et al, Occurrence and persistence of future atmospheric stagnation events]
India will be worst hit by such atmospheric stagnation, according to the computers. But nobody escapes, including the U.S.
Of course, there’s a way to ward off this predicted outcome. It already made sense to try to stop pollutants like soot and ozone from entering the air in the first place and to cut back on the emissions of greenhouse gases like carbon dioxide and methane. Now it seems we’d get the additional benefit of preventing the increase in the number of bad air days. Just trying to clear the air here.
—David Biello
