听广告学英语-Dowell Motors Range Rovers汽车

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VOA常速英语2008年-US Government Reviews Laser Eye Surgery

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VOA标准英语2013--The History of the Laser

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VOA标准英语2012--Mapping Mountain Range Found Under Antarctic Ice

Mapping Mountain Range Found Under Antarctic Ice Its late afternoon at the Lamont-Doherty Earth Observatory, where Robin Bell is at work analyzing various images of glaciers and plotting her next expedition to the frozen southern pole. She takes a br

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By Meredith Buel Washington 02 October 2007 The Pentagon says a recent successful test of the nation's missile defense system could boost support for the controversial project, which is designed to protect America from missiles fired by countries suc

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Every year satellites are damaged or destroyed by objects orbiting the Earth's atmosphere. An Australian company is now using the latest laser technology to track these objects in order to reduce cosmic damage. Li Dong has the details. Even in space,

VOA常速英语2007年-Scientist in Texas Runs NASA's Lunar Laser Prog

By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti

VOA标准英语2008年-Russia: Iran's Current Missile Range Too Short

The United States and Russia continue sparring over a Central European missile defense system, as Secretary of State Condoleezza Rice says America is committed to protecting its allies from a possible Iranian missile attack, and her Russian counterp

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By Meredith Buel Washington 17 September 2009 Defense Sec. Robert Gates (L) and Joint Chiefs Chairman Adm. Michael Mullen arrive for a news conference at the Pentagon, 03 Sep 2009 U.S. Defense Secretary Robert Gates said Thursday that the decision t