单词:sound-absorption coeffecient
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EXPLORATIONS - Scientists Call for Quieter Ships to Protect Whales BARBARA KLEIN: Im Barbara Klein. STEVE EMBER: And Im Steve Ember with EXPLORATIONS in VOA Special English. Our subject today is whales. We discuss a report on the effect of noise from
SCIENCE IN THE NEWS - Scientists Search for the Lost City of Atlantis FAITH LAPIDUS: This is SCIENCE IN THE NEWS, in VOA Special English. Im Faith Lapidus. BOB DOUGHTY: And Im Bob Doughty. Today, we tell about efforts to find the lost city of Atlanti
Isaac Newton: One of the Worlds Greatest Scientists SHIRLEY GRIFFITH:This is Shirley Griffith. STEVE EMBER: And this is Steve Ember with the VOA Special English program, Explorations. Today we tell about one of the worlds greatest scientists, Isaac N
Imagine a world where sunlight can be captured to produce electricity anywhere, on any surface. The makers of thin-film flexible solar cells imagine that world too. But a big problem has been the amount of silicon needed to harvest a little sunshine.
EXPLORATIONS - NASAs Aquarius Satellite Will Help Scientists Learn About Salt Levels in the Sea STEVE EMBER: Im Steve Ember. DOUG JOHNSON: And Im Doug Johnson with EXPLORATIONS in VOA Special English. Today we tell about an American space agency proj
Bird Counts Show Species Decreasing Huntley Meadows Park in Fairfax County, Virginia, is home to a wide variety of birds. That's where Ana Arguelles and her husband, Jeff Wneck, who live next to the 588-hectare wetlands, take part in the annual count
Scientists Aim to End HIV Epidemic The HIV/AIDS epidemic is more than 30 years old. However, at the 19th International AIDS Conference Tuesday there was talk of ending the epidemic through scientific advances and public health policy. Dr. Anthony Fau
Social Scientists Rethink Role of City Big cities are vibrant hubs for culture and industry, or dirty, congested, impersonal crime-ridden warrens. As the world population surpasses seven billion, economists, environmentalists and social scientists ar
Obama Hosts Top Teenage Scientists Fourteen-year-old business owner Joe Hudy and one of his inventions, a compressed air cannon that shoots marshmallows, attracted President Obamas attention at the White House Science Fair. The president invited Joe
Scientists Recreate Ancient Mating Call from Dinosaur Age It was probably a noisy world, with thousands of other animal sounds, rushing streams and the rustle of giant ferns and coniferous trees. Fernando Montealegre studies how insects sing and hear
Scientists Infect Mosquitoes to Stop Dengue Australian researchers report success in attacking the insects that carry the dengue virus, a rarely fatal disease that nonetheless takes a huge toll in sickness and economic loss in the tropical areas wher
Scientists Target Mosquito-Borne Illnesses Of all the disease-spreading insects in the world, the mosquito poses the greatest menace, according to the World Health Organization (WHO). As if to underscore that threat, two mosquito-borne viral diseases
HEALTH REPORT - Scientists Find New Clue about Acupuncture By Jerilyn Watson Broadcast: Wednesday, March 17, 2004 This is the VOA Special English Health Report. A Chinese book on the ancient practice
Around the world, many people start their day with a cup of coffee, a cappuccino, or an espresso. At the same time, there are many people with various thyroid conditions who rely on synthetic thyroid hormone replacement medication like levothyroxine
By Anjana Pasricha New Delhi 16 October 2006 Nepalese Home Minister Krishna Prasad Sitaula, left, and Maoist rebels spokesperson Krishna Bahadur Mahara, address a joint press conference in Katmandu, October 12, 2006 Nepal's government and communist
BEIJING, Oct. 13 (Xinhuanet) -- Scientists have decoded the genome of Black Death which caused one of the worst plagues in human history. The finding was published Wednesday in the scientific journal Nature. A team of German, Canadian and American sc
Scientists have determined it's not advisable to hurry marriage. Get the scoop on the best age to be wed. 科学家们建议,结婚也不可以操之过急。现在,让我们对应该何时结婚来探个究竟吧。 We doubt you were shocked whe
If you want to boost your childs results at school, you could do a lot worse than ensuring that they do plenty of exercise. Scientists have already shown that physical activity can make you brainier. But a team in America has used scans to show that
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WASHINGTON, April 16 (Xinhua) -- Researchers at the University of Colorado (CU) have found that lack of a specific gene interrupts neural tube closure, a condition that can cause death or paralysis. The study was the cover story this week in the jour