[网络] 激光晶体；雷射晶体

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(86) / 评论(0)

VOA常速英语2008年（四月）

与美国小学生一起学英文第1册第8期:雪

Snow 雪 Snow comes from clouds, and it is made of snowflakes. 雪从云里来，它是由雪片形成的。 As snowflakes grow bigger and heavier in the cloud, they fall toward the ground. 当云中的雪片变得更大、更重时，它们就会落向

发表于:2018-12-13 / 阅读(52) / 评论(0)

与美国小学生一起学英文第1册

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(76) / 评论(0)

2013年VOA慢速英语(二)月

英语名人堂：玛利亚·莎拉波娃

玛利亚莎拉波娃（Maria Sharapova），1987年4月19日出生于俄罗斯西伯利亚汉特曼西自治区尼尔根。俄罗斯职业网球运动员。 2004年，莎拉波娃在温网决赛中横扫塞雷娜威廉姆斯，夺得职业生涯的首

发表于:2018-12-29 / 阅读(49) / 评论(0)

英语名人堂

英伦广角粘性物使骨头结实并且柔软

New news is goo newswhen its inside our bones, anyway. Because a combination of imaging techniques and modeling has revealed that our bones are filled with a natural chemical goo thats key to the bones function as support structures. The finding is i

发表于:2019-01-02 / 阅读(58) / 评论(0)

英伦广角

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(93) / 评论(0)

2017年VOA慢速英语(七)月

SSS 2011-10-05

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.

发表于:2019-01-08 / 阅读(122) / 评论(0)

Scientific American(十)月

蟑螂奶未来或成为超级食品

An international team of scientists has just sequenced a protein crystal located in the midgut of cockroaches. The reason? 最近，一个国际科学家团队确定了蟑螂中肠内的蛋白质晶体的结构序列。为什么要研究这个？ Its

发表于:2019-01-08 / 阅读(125) / 评论(0)

阅读空间

SCIENCE REPORT - Snow Facts

SCIENCE REPORT – January 16, 2002: Snow Facts By George Grow This is the VOA Special English SCIENCE REPORT. Winter weather has arrived in northern areas of the world. In much of the United States,

发表于:2019-01-08 / 阅读(84) / 评论(0)

科技之光

SCIENCE IN THE NEWS - Snow

SCIENCE IN THE NEWS - December 10, 2002: Snow By George Grow VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with SCIENCE IN THE NEWS, a VOA Special English program about recent dev

发表于:2019-01-08 / 阅读(111) / 评论(0)

科技之光

VOA慢速英语2011-SCIENCE IN THE NEWS - Let It Snow!

FAITH LAPIDUS: This is SCIENCE IN THE NEWS, in VOA Special English. Im Faith Lapidus. BOB DOUGHTY: And Im Bob Doughty. Today, we will tell you everything you wanted to know about snow. (MUSIC) FAITH LAPIDUS: Winter has returned to northern parts of t

发表于:2019-01-11 / 阅读(49) / 评论(0)

2011年VOA慢速英语(一)月

VOA标准英语2013--The History of the Laser

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 go from the sci

发表于:2019-01-12 / 阅读(123) / 评论(0)

2013年VOA慢速英语(五)月

VOA慢速英语2012--The Laser: Futuristic Science Found at Your Local Store

EXPLORATIONS - The Laser: Futuristic Science Found at Your Local Store MARIO RITTER: 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

发表于:2019-01-12 / 阅读(89) / 评论(0)

2012年VOA慢速英语(一)月

VOA标准英语2009年-Website of the Week — SnowCrystals.c

An online guide to snow and other ice phenomena Art Chimes | Washington, DC 18 December 2009 Photo: SnowCrystals.com Time again for our Website of the Week, when we showcase interesting and innovative online destinations. For those of us in the north

发表于:2019-01-13 / 阅读(82) / 评论(0)

VOA标准英语2009年(十二月)

VOA慢速英语20060110b

SCIENCE IN THE NEWS - Winter Cold: Everything You Ever Wanted to Know About SnowBy George Grow Broadcast: Tuesday, January 10, 2006 (MUSIC) VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob D

发表于:2019-01-16 / 阅读(108) / 评论(0)

2006年慢速英语（一）月

VOA慢速英语2010年-SCIENCE IN THE NEWS - There Is a Lot M

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Shirley Griffith. VOICE TWO: And I'm Steve Ember. Today, we tell you everything you ever wanted to know about snow. (MUSIC) VOICE ONE: Justin Snow of the Indianapolis Colts stands in

发表于:2019-01-31 / 阅读(268) / 评论(0)

2010年慢速英语(一)月

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(105) / 评论(0)

VOA常速英语2007年（十一月）

女博士自绘漫画版化学论文

Late last spring, a doctoral student worked late into the night. As she doodled, her chemistry thesis took on a life of its own, transforming into a comic book. 去年春末，一位博士生常常忙到深夜。经过她的妙笔，她的化学论文以

发表于:2019-02-05 / 阅读(82) / 评论(0)

阅读空间

美不胜收澳大利亚现罕见雨幡洞云

Amazing photographs have emerged capturing one of the skys rarer sights a cloud formation known as a fallstreak hole. 这些精彩照片拍下了一种罕见的天象雨幡洞云。 Also known as a hole punch cloud the unusual occurrence, which appea

发表于:2019-02-18 / 阅读(60) / 评论(0)

英语新闻

人生的结晶

Chemistry on an experiment called the crystal. First the formation of chemical substances dissolved in water solution, solution Sheng Yu evaporating dish, the evaporating dish placed in steel tripod, the following alcohol lamp heating, control-relate

发表于:2019-02-21 / 阅读(75) / 评论(0)

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学英语单词

assenter

atilano

barium meta carbonate

basic nonchinese character set