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US Spacecraft to Probe Origin of Gamma Rays

By David McAlary The U.S. space agency, NASA, launched a satellite Saturday that scientists hope will help them locate the sources of mysterious gamma ray explosions, the brightest most energetic burs

发表于:2019-01-03 / 阅读(65) / 评论(0)

VOA2004（下）--健康科技

VOA慢速英语2009年-SCIENCE IN THE NEWS - 'On the Origin o

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Doug Johnson. November twenty-fourth marked the one hundred fiftieth anniversary of one of the most influential books ever written. Naturalist Charles

发表于:2019-01-11 / 阅读(158) / 评论(0)

VOA慢速英语2009年（十二）月

AGRICULTURE REPORT - Congress Delays Country of Origin Label

AGRICULTURE REPORT - Congress Delays Country-of-Origin Labeling By Mario Ritter Broadcast: Tuesday, January 27, 2004 This is Faith Lapidus with the VOA Special English Agriculture Report. The United S

发表于:2019-01-25 / 阅读(61) / 评论(0)

农业与发展

影视歌曲：《邪恶力量》插曲 Fire of Unknown Origin 无名之火

Death comes sweeping through the hallway 死神降临，在走廊里漫步 Like a lady's dress 像一位盛装女王 Death comes driving down the highway 死神降临，在高速路上疾驰 In its sunday best 穿着节日盛装 A fire of unknown ori

发表于:2019-02-11 / 阅读(75) / 评论(0)

影视英文歌曲

TED演讲:宇宙有中心吗(2)

Shortly after Copernicus, in the 1580s, an Italian friar, Giordano Bruno, 哥白尼死后不久，在十六世纪80年代，意大利修道士焦尔达诺布鲁诺提出， suggested the stars were suns that likely had their own planets and that the

发表于:2019-02-13 / 阅读(25) / 评论(0)

TED演讲教育篇

The origin of coffee

The brains behind QI, the BBC quiz show, explore where and when coffee originated. Desert fruitEvery cup of coffee you drink owes its existence to a fruit that grew wild in the Yemeni desert. The Sufi mystics of Yemen were the first to roast and brew

发表于:2019-02-18 / 阅读(59) / 评论(0)

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axis of the celestial sphere