This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. There's a huge, gunky brown cloud that lingers over south Asia and the Indian Ocean each winter. Its been known to cause respiratory diseases and even

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(一)月

Don: Time to go again to the A Moment of Science mailbag. Yal: A listener writes: Dear A Moment of Science, Scientists know that one day we'll run out of oil and other natural sources of energy. Beyond solar power and wind power and ethanol, what are

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SCIENCE REPORT — February 7, 2002: Fuel Cell Cars By Mario Ritter This is the VOA Special English SCIENCE REPORT. The United States Secretary of Energy, Spencer Abraham, has announced a program to d

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Take for an example, bio-diesel fuel can be made from vegetable oil and animal fats, and its chemical make up includes carbin chains, joush worth knows that he didn't learn the chemistry class and hasn't taken chemistry yet. Brook horper, a field in

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SCIENCE IN THE NEWS - A Silent Killer Carbon Monoxide Poisoning This is SCIENCE IN THE NEWS, in VOA Special English. I'm Christopher Cruise. And I'm Bob Doughty. Winter has brought cold weather to many parts of Earths northern hemisphere. With the co

发表于:2019-01-12 / 阅读(50) / 评论(0) 分类 2013年VOA慢速英语(三)月

AS IT IS 2016-05-03 Arts Fuel Tech Creativity in Children An American library is giving children a new way to learn important life skills by combining art projects with traditional school subjects, like mathematics and science. The program is called

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