PTE听力口语练习-科学60秒-Molecular-Analysis

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:


60秒科学:Molecular-Analysis-Resurrects-Old-Artworks

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。

Imagine finding a new painting by Renoir. In a way, Northwestern University chemist Richard Van Duyne did just thatby revealing the original colors of what is now the faded remains of the original Madame L¨on Clapisson. He showed what it currently looks like at the recent meeting of the American Association for the Advancement of Science in Chicago.

Somewhere near the edges where the frame was surrounding it, it protected the painting a bit from fading. And so we analyze what the molecules were under the frame to tell us what they should be now.

Van Duyne is a pioneer in the analysis of the molecular composition of materials. In this case he identified a red paint called carmine lake that was known to fade. He then showed a re-colorized version of what we imagine the painting was, based on the molecular information provided by this surface enhanced ramen spectroscopy.

The new image is much richer, the reds more vibrant, and the woman in the painting pops out with greater depth.

Molecular analysis of paintings, that’s really what’s new. There’ve been many ways to analyze the inorganic content of paintings and the elemental composition, brilliant methods, and now we add molecular resolution to the whole enterprise.

–Cynthia Graber

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