This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro

发表于:2018-12-24 / 阅读(72) / 评论(0) 分类 Scientific American(三)月

By Brian Padden Blacksburg, Virginia 19 April 2007 In the aftermath of the deadliest mass shooting in U.S. history, the residents of the Blacksburg, Virginia are visibly shaken. Virginia Tech University is located in this rural town about four hours

发表于:2019-01-07 / 阅读(71) / 评论(0) 分类 2007年VOA标准英语(四月)

By Jim Malone Washington 19 April 2007 Investigators said Thursday the disturbing video images of the student responsible for the worst shooting spree in U.S. history did not add much to their probe of what happened and why at Virginia Tech Universi

发表于:2019-01-07 / 阅读(67) / 评论(0) 分类 2007年VOA标准英语(四月)

This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ

发表于:2019-01-08 / 阅读(73) / 评论(0) 分类 Scientific American(四)月

AMERICAN MOSAIC -March 15, 2002: Music written by John Williams / A question about Saint Patrick's Day / Watching baseball players get ready for the season Broadcast: HOST: Welcome to AMERICAN MOSAIC —

发表于:2019-01-30 / 阅读(192) / 评论(0) 分类 American Mosaic

Voice 1 Hello. Im Liz Waid. Voice 2 And Im Ruby Jones. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 A woman sits by her sons

发表于:2019-03-04 / 阅读(134) / 评论(0) 分类 环球英语 Spotlight