单词:close-confinement laser
单词:close-confinement laser 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
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
1. Democratic Presidential candidate XX, XX,XX answer questions in a Town Hall format Edward on Monday night. It was one of last sentence to address voters before the February first Edward quark state. 2. There were science progress says the east coa
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
By David Gollust Washington 19 May 2006 The United States Friday reaffirmed its desire to close its detention site for terrorist suspects at Guantanamo Bay, Cuba, once legal questions about the detain
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