单词：sigma delta converters and filters
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Broadcast: January 27, 2003 By Jill Moss This is the VOA Special English Development Report. Researchers have discovered a simple answer to a huge problem in developing countries. They have found that
VOA2003（上）-健康资讯
Thank you very much 非常感谢 First of all, thank you 首先 谢谢你们 I thank you and Dr. Paula WhetselRibeau 谢谢你们 还有宝拉?威索尔里博博士 Thank you for meeting me outside with your daughter 谢谢你带着你女儿在外面接
公众人物毕业演讲
If, as it now seems, every single galaxy has a black hole at its heart, this can't be a coincidence. Perhaps black holes are an essential part of what galaxies are and how they work. No one had expect
超大质量黑洞
Diesel fuel in the US and the fumes from diesel engines are about to get a whole lot cleaner. As of today, the Environmental Protection Agency is requiring much of the diesel in the country to have 97% less sulfur in it. It's the start of a project
2006年NPR美国国家公共电台
This Business English Podcast lesson is the first in a series of shows that will follow an employee of a manufacturing company on a training trip to the U.S. Over the series, well practice many situations that will be useful for you on your business
原汁原味商务英语播客
DEVELOPMENT REPORT – Cloth Filters Fight Cholera By Jill Moss Broadcast: Monday, February 14, 2005 I'm Gwen Outen with the VOA Special English Development Report. A few years ago, researchers discov
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