1、翻譯劃線句子
09年理工類C級考題
Light Night, Dark Stars
1 Thousands of people數(shù)以千計around圍繞 the globe地球 step步行行走 outside 外面to gaze at 凝視their night sky.夜晚的天空 On a clear night, with no clouds, moonlight, or artificial lights to block the view,2 people can see more than 14,000 stars in the sky, says Dennis Ward, an astronomer (天文學家) with the University Corporation for Atmospheric Research (UCAR) in Boulder, Colo. But when people are surrounded by city lights, he says,3 they're lucky幸運的 to see 150 stars.
4 If you've ever曾經(jīng)driven toward朝，向 a big city at night and seen its glow 發(fā)光from a great distance從遠處, you've witnessed見證，目擊 light光 pollution污染, 5 it occurs發(fā)生 when light from streetlights路燈, office buildings辦公樓, signs標志, and other sources來源 streams流動流入 into space and illuminates (照亮) the night sky. 6 This haze (朦朧) of light makes many stars invisible 不可見to people on Earth. Even at night, big cities like New York glow from light pollution, making stargazing difficult.
7 Dust灰塵 and particles微粒 of pollution污染 from factories 工廠and industries 工業(yè)worsen使變得更壞 the effects 影響of light pollution. "If one city has a lot more light pollution than another," Ward says, "that city will suffer the effects of light pollution on a much greater scale."8 Hazy朦朧的 skies also make it far more difficult for astronomers to do their jobs.
9 Cities are getting larger. Suburbs are growing in once dark, rural areas. Light from all this new development is increasingly obscuring (使變模糊) the faint (微弱的) light given off by distant stars. And if scientists can't locate these objects, they can't learn more about them.
10 Light pollution doesn't only僅僅 affect star visibility能見度. It can harm 傷害wildlife野生動物 too. It's clear that artificial light can attract animals, making them go off course. There's increasing evidence, for example, that migrating (遷徙) birds use sunsets and sunrises to help find their way, says Sydney Gauthreaux Jr., a scientist at Clemson University in South Carolina. "When light occurs at night," he says, "it has a very disruptive (破壞性的) influence." Sometimes birds fly into lighted towers, high-rises, and cables from radio and television towers. Experts estimate that millions of birds die this way every year.
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