单词：tail spar
单词：tail spar 相关文章
By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca
VOA常速英语2008年（四月）
EXPLORATIONS - The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can
2013年VOA慢速英语(二)月
The United States Navy has demonstrated a new laser weapon operating in the Persian Gulf. The Laser Weapons System, or LaWS, is deployed on the USS Ponce transport ship. A live test firing of the weapon was recently carried out for Cable News Network
2017年VOA慢速英语(七)月
And to just prove that, the guys are going to tear apart a TV. All set? Lets go. Were going to put a pound of C4 into the television, and then film the explosion on two different high-speed cameras. One will be filming at 1,000 frames per second and
探索与发现2013年
Telling the viewers they are seeing something when they are actually seeing something different is, in the opinion of all reputable TV makers, beyond the pale . But what of the ordinary techniques that TV producers use everyday in pursuit of their c
英伦广角
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常速英语2007年（十一月）