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专四听写训练105:Light Pollution

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We usually think of pollution as a harmful waste substance that threatens the air and water. But some people have become concerned about another kind of pollution. It can be everywhere, depending on the time of day. And it is not thought of as a substance. It is light.

The idea of light pollution has developed with the increase of lights in cities. In many areas, this light makes it difficult or impossible to observe stars and planets in the night sky. Light pollution threatens to reduce the scientific value of research telescopes.

Light pollution is the result of wasted energy. Bright light that shines into the sky is not being used to provide light where it is needed on Earth. Lights that are brighter than necessary also cause light pollution. Recently, two Italian astronomers and an American environmental scientist created a world map of the night sky. The map shows that North America, Western Europe and Japan have the greatest amount of light pollution. (165 words)

Useful Words and Expressions

substance    物质

a mineral substance   矿物

the substance of a speech   讲话的要旨

a man of substance   财主

in substance   实质上,本质上,大体上

sacrifice the substance for the shadow   只图虚名不求实效;舍本逐末

waste one's substance   浪费钱财

become concerned about   开始关心;关心,担忧

 

 

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2011-12-25 14:53 编辑:wjy2005tom
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