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。悉尼文波雅思PTE培训学校专门为澳洲，尤其是悉尼、墨尔本的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：
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。
Living longer doesn’t necessarily mean living better.
That’s the lesson from the tiny round worm calledC.elegans, long a workhorse in basic biology labwork.
The research is in the Proceedings of the National Academy of Sciences.
In the study, thousands of normal C. elegans competed against strains that live days or weeks longer than their brethren, because of factors like genetic mutations or very low–calorie diets.
But a battery of tests to see how the all older worms moved or responded to stress revealed some hard truths:
increased life span did not usually come with a prolonged period of health and strength.
Indeed, the “good times” for each of the worms was roughly the same, regardless of their overall life span.
In other words, the longer–living worms spent a greater proportion of their lives in adiminished state—with less mobility and stress resistance.
Aging worms are not aging humans.
But if the findings do extend to people, then life–extension efforts, such as calorierestriction, may not shake out to a better old age, just more years of frailty.
With associated health care cost increases and quality of life decreases.
The researchers suggest that it’s time to start thinking about what they call “healthspan”—and maximizing “healthspan,”rather than just tacking on years of poor quality.
mutation：[mju:ˈteɪʃn] n.变异
brethren：[ˈbreðrən] n.同胞
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