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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
Describing Chance and Probability Raul: What are the chances that Rob will be here on time? Tiffany: Id say its fifty- fifty. You never know. He might surprise us and be early. Raul: Fat chance of that happening. Ive known him for three years and if
2013年ESL之日常生活
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）
Boston researchers have developed a supercomputer they claim can predict with 96% probability if a patient is about to die. 波士顿的研究人员发明了一种超级计算机，据说能预测病人是不是快要死亡，准确性高达96%。 Th
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