单词：fused silica reflector
单词：fused silica reflector 相关文章
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
Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
英语听力文摘 English Digest
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
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
1. The Bush administration and Congress are working through the weekend to hammer out a Wall Street rescue plan. President Bush is asking lawmakers to let the government buy 700 billion dollars in bad mortgages from US financial institutions for the
美联社新闻一分钟2008年(九)月
This is AP News Minute. Investigators in Illinois say a police officer whose fatal shooting triggered a massive manhunt committed suicide. Police say the officer carefully staged his death because he was about to be exposed as a thief. The British go
美联社新闻一分钟2015（十一）月
AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be
2015年VOA慢速英语(七)月
Students Fuse Art from Shattered Glass BETHESDA, MARYLAND When Lynda Slayen first discovered fused glass about 10 years ago, she immediately fell in love with the technique. Ive always loved glass. I collect glass. I have a lot of antique glassand th
VOA标准英语2014年(一月)
What is mother for? M is for the million things she gave me. O menas only that she 's growing old. T is for the tears she shed to save me. H is for her heart of purest gold. E is for her eyes ,with the love-light shining. R means right ,and right sh
白领英语晨读
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
2016CRI中国国际广播电台
AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin
2018年NPR美国国家公共电台12月
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）
The Donkey and the Statue A donkey was once chosen to carry a holy statue through the town．Crowds of people came from all over the countryside to see the procession．They lined both sides of the street，pushing and jostling to get nearer to the f
趣味英语
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）
This is AP News Minute. 1. In a stunning move, house majority leader Kevin McCarthy has withdrawn his candidacy for speaker, and the election for the position has been postponed. Republican lawmaker said McCarthy told colleagues at the start of the G
美联社新闻一分钟2015(十)月
What Would You Ask Her? 你会向她提什么问题? One question has intrigued art lovers around the world for generations: what is the secret behind the Mona Lisas enigmatic smile? Well now they have the chance to ask her directly, thanks to a new
英语听力精选进阶版
A: Ha-ha, it's really a good news. A: 哈哈，真是个好消息。 B: What makes you so happy? B: 什么事情让你那么高兴啊? A: Jay Chou will hold a live concert in Beijing next month. A: 周杰伦下个月将会在北京举办一场现场音
英语脱口秀之流行时尚
CHANGSHA, July 5 (Xinhua) -- A section of a highway running near a major river in central China's Hunan Province caved in early Thursday, engulfing a passing vehicle and killing at least one person aboard. The cave-in, near the Poly International Pla
英语新闻
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
2016CRI中国国际广播电台
The exhibitions organiser Wang Hui spent two years preparing the collection with a team of over 400 digital artists in South Korea, at a cost of around 50m yuan. He says, What's special about this is that it's the first time 3D technology, holographi
英语时差8，16