单词：radar range scale
单词：radar range scale 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
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）
population 母体 sample 样本 census 普查 sampling 抽样 quantitative 量的 qualitative/categorical 质的 discrete 离散的 continuous 连续的 population parameters 母体参数 sample statistics 样本统计量 descriptive statistics 叙述统
英语口译