激光气象雷达

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) 分类 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

发表于:2018-12-16 / 阅读(76) / 评论(0) 分类 2013年VOA慢速英语(二)月

New Laser Device Helps Parkinson's Patients Walk 新激光设备帮助帕金森患者重获行走能力 Parkinsons disease slowly destroys the brains ability to control the muscles, depriving the patients of their mobility. Researchers at the Mayo Cl

发表于:2018-12-16 / 阅读(60) / 评论(0) 分类 VOA标准英语2014年(二月)

Every year on the 23rd of March, the World Meteorological Organization (WMO) celebrates World Meteorological Day (WMD). This is the date in 1950 that the WMO was created. A year later, it became a specialized agency of the United Nations to observe t

发表于:2018-12-29 / 阅读(77) / 评论(0) 分类 英语课程学习计划和讲义

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(92) / 评论(0) 分类 2017年VOA慢速英语(七)月

This is All Things Considered. I'm Michelle Norris. Phone calls from Sweden woke up two American scientists this morning, John Hall and Roy Glauber. They will share the Nobel Prize for Physics with a German Researcher Theodor Haensch. All three worke

发表于:2019-01-08 / 阅读(139) / 评论(0) 分类 2005年NPR美国国家公共电台

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(122) / 评论(0) 分类 2013年VOA慢速英语(五)月

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) 分类 2012年VOA慢速英语(一)月

Every year satellites are damaged or destroyed by objects orbiting the Earth's atmosphere. An Australian company is now using the latest laser technology to track these objects in order to reduce cosmic damage. Li Dong has the details. Even in space,

发表于:2019-01-19 / 阅读(95) / 评论(0) 分类 世界各地新闻集锦

BEIJING/TAIPEI, Feb. 26 (Xinhua) -- A 6.0 magnitude earthquake hit Taiwan's Pingtung at 10:34 Beijing Time (02:34 GMT) on Sunday, said the China earthquake network center (CENC). The epicenter was monitored at 22.8 degrees north latitude and 120.8 de

发表于:2019-01-19 / 阅读(112) / 评论(0) 分类 英语新闻

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) 分类 VOA常速英语2007年(十一月)

JINAN, Aug. 2 (Xinhua) -- Typhoon Damrey made landfall in east China's Jiangsu province on Thursday night, bringing gales and rains to Jiangsu and its neighbouring Shandong province. Damrey, the tenth typhoon of the year, came ashore near the Chenjia

发表于:2019-02-05 / 阅读(98) / 评论(0) 分类 英语新闻

Scientists are struggling to understand why a burst of scary warming at the North Pole has pushed Arctic temperatures nearly 20C higher than normal for this time of year. 科学家们感到费解,北极突然出现的可怕变暖为何会导致北极

发表于:2019-02-05 / 阅读(69) / 评论(0) 分类 英语新闻

The National Meteorological Center (NMC) has issued a yellow alert for high temperatures as China is entering the height of summer. A heat wave will hit central, eastern and northern China today with temperatures in some regions rising to around 40 d

发表于:2019-02-05 / 阅读(155) / 评论(0) 分类 英语新闻

BEIJING, April 22 (Xinhua) -- China's meteorological authorities on Sunday issued a blue alert, the lowest level in the warning system, against sandstorms that are expected to hit the country's northwest regions. The National Meteorological Center (N

发表于:2019-02-06 / 阅读(72) / 评论(0) 分类 英语新闻

BEIJING, Jan. 29 (Xinhua) -- China's meteorological authority has introduced a new weather warning system for smog which will use readings of PM 2.5, a particle pollutant. The announcement comes as thick haze chokes many cities. The National Meteorol

发表于:2019-02-06 / 阅读(88) / 评论(0) 分类 英语新闻

BEIJING, Dec. 15 (Xinhua) -- China's meteorological authorities on Saturday issued a blue-coded alert for fog in most parts of the country's central and northern provinces from Saturday night to Sunday morning. Most parts of north China, southwest Ch

发表于:2019-02-06 / 阅读(82) / 评论(0) 分类 英语新闻

BEIJING, Jan. 21 (Xinhua) -- China's meteorological authorities said Monday that central and east China will be shrouded in fog through Tuesday morning. The National Meteorological Center (NMC) issued a blue alert for the fog. Blue is the lowest leve

发表于:2019-02-08 / 阅读(124) / 评论(0) 分类 英语新闻

Cold snap to sweep through China BEIJING, Oct. 28 (Xinhua) -- China's central and eastern regions will experience temperature drops in coming days, while the southern parts will receive moderate to heavy rain, the national meteorological watchdog for

发表于:2019-02-13 / 阅读(80) / 评论(0) 分类 英语新闻

BEIJING, July 28 (Xinhua) -- The observatory of Beijing on Saturday issued a blue alert for strong wind and hails in northeastern suburban region of the city. Strong wind, rains and hails are expected to hit northern Huairou District and Miyun County

发表于:2019-03-02 / 阅读(1869) / 评论(0) 分类 英语新闻
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