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SSS 2011-12-01

时间:2012-01-13 03:29来源:互联网 提供网友:gmeng   字体: [ ]
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 Milan is one of Europe’s most polluted cities and that puts Leonardo da Vinci’s The Last Supper at risk. The painting has been on the wall of a dining hall in Milan’s Santa Maria Delle Grazie monastery1 for more than 500 years.

 
Particulates2 in the air from motor vehicles can accumulate and damage works of art. In response, Italian authorities installed a high-tech3 system of heating, ventilation and air conditioning.
 
To test its efficacy, researchers installed air monitors throughout the room housing the masterpiece, and outdoors. Over a year, they found that fine particulates were reduced indoors by 88 percent, and coarse particulates by 94 percent, compared to the levels outside. The research was in the journal Environmental Science and Technology. 
 
The scientists say that’s a huge success.
 
The painting has been threatened before—by Napoleon’s army, by the poor attempts of previous conservators, by bombs during World War II. Even airborne lipids from visitors’ skin can pose a danger, mitigated4 by a strict regulation on the number of viewers.
 
But if conservation measures are successful, The Last Supper should feed art lovers for centuries to come.
 
Thanks for the minute. For Scientific American’s 60-Second Science, I’m Cynthia Graber.

点击收听单词发音收听单词发音  

1 monastery 2EOxe     
n.修道院,僧院,寺院
参考例句:
  • They found an icon in the monastery.他们在修道院中发现了一个圣像。
  • She was appointed the superior of the monastery two years ago.两年前她被任命为这个修道院的院长。
2 particulates 24011a21c8b46b35a9bfd904211c7c51     
n.微粒,粒子( particulate的名词复数 )
参考例句:
  • Techniques for controlling particulates include filtering, washing, centrifugal separation, and electrostatic precipitation. 控制颗粒污染物的技术包括过滤、洗涤、离心分离、静电沉降。 来自英汉非文学 - 环境法 - 环境法
  • Only micronic particulates penetrate to the depth of the lung. 只有微细粒子穿透到肺深部。 来自辞典例句
3 high-tech high-tech     
adj.高科技的
参考例句:
  • The economy is in the upswing which makes high-tech services in more demand too.经济在蓬勃发展,这就使对高科技服务的需求量也在加大。
  • The quest of a cure for disease with high-tech has never ceased. 人们希望运用高科技治疗疾病的追求从未停止过。
4 mitigated 11f6ba011e9341e258d534efd94f05b2     
v.减轻,缓和( mitigate的过去式和过去分词 )
参考例句:
  • The cost of getting there is mitigated by Sydney's offer of a subsidy. 由于悉尼提供补助金,所以到那里的花费就减少了。 来自辞典例句
  • The living conditions were slightly mitigated. 居住条件稍有缓解。 来自辞典例句
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