单词：specular reflector
单词：specular reflector 相关文章
神奇校车带领孩子们进入浩瀚的科学领域，游梭于生物科学、地球科学、太空科学、气象学、古生物学等各门学科中。被纽约时报评为最新鲜有趣、最富有创意和想象力的科学启蒙方式。孩子
神奇校车系列丛书
Popular Indian Yoga Guru Could Influence Election Gopal Singh Bisht says he was healed from Hepatitis B under Ramdevs guidance. He believes its now his duty to spread the gurus message. Soon, he will join thousands of others in traveling across India
VOA标准英语2012年(九月)
THE MAKING OF A NATION - June 20, 2002: Post-World War Two / Population By David Jarmul VOICE 1: THE MAKING OF A NATION -- a program in Special English by the Voice of America. (Theme) World War Two e
The Making of a Nation
In 1970, the Soviet Union put a laser reflector on the moon, carried by a rover. A few months later, it disappeared. Some speculated that the rover had fallen into a crater or parked in such a way as to render the reflector inaccessible. Now after 40
Scientific American(四)月
据《科学》杂志报道，苏联的月球车40年前在月球表面留下了激光反射器，虽然经过多年的搜寻科学家始终没有发现激光反射器的踪迹。 4月22日，一组物理学家终于发现了来自反射器的微弱闪
60秒科学
AMERICAN MOSAIC - November 15, 2002: Rap Loses a Popular Artist / Question About the John Kennedy Assassination / 20th Anniversary of the Vietnam Veterans Memorial Broadcast: HOST: Welcome to AMERICAN
American Mosaic
Gain - This is an increase in signal power, due to a boost from an electronic device. Garbage - These are unwanted characters that appear because of either incorrect settings or noise. Gate - These ar
电信英语
By Jim Malone Washington 27 February 2007 One of the big winners at this year's Academy Awards in Hollywood was former Vice President Al Gore. Gore was featured in a film about global warming called An Inconvenient Truth, which won the Oscar for bes
2007年VOA标准英语（二月）
Eels，来自美国的独立乐队。乐队名字有些奇怪，因为主场的名字，Everett，被称作Mr. E，所以乐队名尤其彰显了E这个字母的存在感么~Like looking at the deep night sky / So many worlds inside her eyes，形容女
天籁音乐
THE MAKING OF A NATION - American History: Popular Culture in '50s STEVE EMBER: Welcome to THE MAKING OF A NATION American history in VOA Special English. Im Steve Ember. Imagine a time machine. Youve just climbed into it for the purpose of visiting
2011年VOA慢速英语(九)月
By Ana Ward Washington, D.C. 26 February 2007 watch Exercise report Many Americans are facing serious health issues associated with unhealthy eating habits and a lack of exercise. With growing health concerns, more people are joining gyms for exerci
2007年VOA标准英语（二月）
Popular Weed Killer Stirs Health, Environmental Concerns Jamie Jamison produces corn, wheat and soybeans on his 500-hectare farm. To boost production, he uses genetically modified seeds. To control weeds, he uses Atrazine. It gives us good long-seaso
VOA标准英语2012年(五月)
Popular Culture Inspires Top US Baby Names Theres a better-than-random chance that babies born in the United States last year, 2010, were named Bella or Edward. Those were among the 10 most popular girls and boys names, respectively, and it was more
VOA标准英语2011年(十二月)
Study: Popular Herbal Remedy Doesn't Ease Enlarged Prostate Scientists investigating a popular herbal treatment for enlarged prostate, saw palmetto, have concluded it is no more effective than a placebo. That conclusion comes from a study which inclu
VOA标准英语2011年(十月)
New Treatment Potential Found in Popular TB Drug Scientists say new insights into a common tuberculosis drug will make it possible to shorten the treatment period for patients infected with TB. The drug pyrazinamide is widely used in combination with
VOA标准英语2011年(八月)
The Five-hundred-meter wide Aperture Spherical Telescope, or FAST, is now operational in the mountains of Guizhou in southwest China. FAST has been designed to help Chinese researchers better understand our universe, as well as probe the cosmos for e
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Bart's upstairs neighbor was driving him nuts. He made all kinds of strange noises at all kinds of strange hours. If I tell my neighbor he's noisy, he won't believe me, Bart thought. He'll believe me only if he lives downstairs and hears himself upst
英文短篇故事（纽约）
HEALTH REPORT - Progression of Age-Related Macular Degeneration By Nancy Steinbach Broadcast: Wednesday, January 28, 2004 This is Phoebe Zimmermann with the VOA Special English Health Report. American
健康与经济
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
VOA常速英语2007年（十一月）
The construction of the project was started in 2011 with an investment of 1.2-billion yuan, or about 180 million US dollars. The 500 metre Aperture Spherical Telescope, or FAST, is the size of 30 football fields. It's located in a hollow that was for
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