单词：space range radar
单词：space range radar 相关文章
January 1991, an F-15 pilot on combat-air patrol sweeps the skies of Iraq. Sheridan, I'm Captain Medrimans, Captain in the 27th fighter squadron, flying in F-15 over Iraq. Today's been a mixed sweep, we started from the central, swept up for Bagdad,
国家地理2007年
Broadcast: Feb 01, 2003 The U.S. Space Shuttle Columbia broke apart in mid-air Saturday minutes before it was to return to Earth. The U.S. space agency, 1) NASA, says none of the seven astronauts aboa
VOA2003（上）-科技先知
Iron Dome defense system uses cameras and radar to track incoming rockets and can shoot them down within seconds of their launch. The system was developed by Rafael, the Israel Military Industries, at a cost of $200 million. Robert Berger | Jerusalem
VOA标准英语2010年(一月)
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
VOA标准英语2012年(一月)
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
VOA标准英语2008年（七月）
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
VOA标准英语2009年(九月)