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

发表于:2018-12-08 / 阅读(55) / 评论(0) 分类 VOA常速英语2008年(四月)

China Restarts Fastest Bullet Trains China will again lay claim to operating the fastest bullet train service in the world. According to Chinese media, the Beijing to Shanghai train will once again be allowed to reach speeds up to 350 kilometers an h

发表于:2019-01-03 / 阅读(42) / 评论(0) 分类 2017年VOA慢速英语(九)月

Japan's New Train Will Be Invisible 日本发明透明火车 Japan is famous for its state-of-the-art high-speed railway system. In 2015, its Magnetic Levitation or Maglev train, which gets its name because it hovers 10 cm above the tracks, set a new

发表于:2019-01-07 / 阅读(26) / 评论(0) 分类 英语新闻

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. In theory, scientists could learn a lot about our health by testing tiny amounts of bodily fluidsa drop of blood, a tear, a bead of sweat. But somethin

发表于:2019-01-08 / 阅读(51) / 评论(0) 分类 Scientific American(十一)月

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

发表于:2019-01-31 / 阅读(73) / 评论(0) 分类 VOA常速英语2007年(十一月)

BEIJING, Feb. 28 (Xinhua) -- Construction began on China's first low-speed maglev(磁力悬浮火车) line Monday in Beijing, a project that will make China only the second country with a low-speed maglev line after Japan. The project marked China's

发表于:2019-02-07 / 阅读(74) / 评论(0) 分类 英语新闻