[激光] 环形激光仪表

VOA常速英语2008年-US Government Reviews Laser Eye Surgery

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(54) / 评论(0)

VOA常速英语2008年（四月）

VOA慢速英语2013 EXPLORATIONS - The History of the Laser

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

发表于:2018-12-16 / 阅读(53) / 评论(0)

2013年VOA慢速英语(二)月

Watch the US Navy’s New Laser Weapon in Action

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

发表于:2019-01-02 / 阅读(62) / 评论(0)

2017年VOA慢速英语(七)月

纯正英语一分钟-musical instrument

I really wish I could play a musical instrument. I cant. I had a few music lessons when I was a kid, but I didnt keep them up. I really regret that now. I get quite jealous of people who can play a musical instrument. Its a wonderful ability. I hope

发表于:2019-01-09 / 阅读(71) / 评论(0)

纯正英语一分钟

EXPLORATIONS - The Guitar: an Instrument for Any Kind of Mus

EXPLORATIONS - The Guitar: an Instrument for Any Kind of Music By Paul Thompson Broadcast: Wednesday, May 25, 2005 (MUSIC) VOICE ONE: I'm Steve Ember. VOICE TWO: And I'm Phoebe Zimmermann with Explora

发表于:2019-01-09 / 阅读(117) / 评论(0)

Explorations

VOA常速英语2007年-Scientist in Texas Runs NASA's Lunar Laser Prog

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(70) / 评论(0)

VOA常速英语2007年（十一月）

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