Scientists Improve Space Weather Forecast Accuracy 科学家改进空间天气预报准确性 At one time, scientists thought the space between Earth and Sun was a vacuum . But we now know that the su

发表于:2018-11-29 / 阅读(106) / 评论(0) 分类 VOA2005(下)--环境科学探索

听遍美国之空难性新闻[4]:20th Anniversary of Mt. St. Helens Eruption Twenty years ago a massive(1) blast(2) sideways from Mount St. Helens vaporized(3) forests in five thousand degree heat, flattened(4) hundreds of miles of timberland, and killed 57

发表于:2018-12-07 / 阅读(73) / 评论(0) 分类 听遍美国

The future of up to 20,000 head of cattle in transit and in holding yards remains uncertain after yesterday's decision to ban live exports. Federal Government backbenchers are also calling for a review into live exports to the Middle East. Meanwhile,

发表于:2018-12-11 / 阅读(26) / 评论(0) 分类 澳洲ABC新闻快递2011年

DEVELOPMENT REPORT – How to Make a Solar Water Heater By Gary Garriott Broadcast: Monday, November 29, 2004 I'm Gwen Outen with the VOA Special English Development Report. Solar water heaters save o

发表于:2019-01-02 / 阅读(60) / 评论(0) 分类 农业与发展

If gravity measurement showed no solid core, then Jupiter formed early like the Sun, with a core then its birth came later when solid materials were created. By measuring water content, Juno should also reveal how hot the solar system was, when Jupit

发表于:2019-01-22 / 阅读(35) / 评论(0) 分类 自然百科2012年

By David McAlary Washington 01 March 2007 The U.S. space agency NASA says two new spacecraft orbiting Earth are giving scientists an unprecedented ability to track storms on the sun all the way to Earth. As VOA's David McAlary reports from Washington

发表于:2019-01-30 / 阅读(46) / 评论(0) 分类 2007年VOA标准英语(三月)