单词:furan polymer
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Are your car bumpers riddled with scars from encounters with tight parking spaces? Did the furniture movers scratch your floor? Wouldn't it be great if t
This is Scientific American's 60-Second Science. Im Cynthia Graber. This will just take a minute. Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because
Most of us blink without thinking. But people whove sustained strokes or combat injuries can lose their ability to blink. Which is important for lubricating and cleaning the eye. Surgery is an optiona small piece of muscle transplanted from the leg c
剧情简介 继那只脾气坏又好吃懒作的加菲猫搞出了一大堆是是非非之后,大银幕上的新一代宠儿由三只古灵精怪的花栗鼠接手故事开始于一个生活在洛杉矶、雄心勃勃却又怀才不遇的词曲作家戴夫所面对的一系列窘境,他的制作人伊恩对于他的作品和女友克莱尔似乎都不甚满意,也
Lowering the Ceiling on Roof Energy Losses Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because traditional black asphalt roofs heat up in summer and s
By Peter Fedynsky Washington, DC 21 November 2006 watch Counterterrorism v Darfur President Bush's Special Envoy for Sudan has denied an allegation that the counterterrorism cooperation between Khartoum and Washington is impeding U.S. efforts to sto
This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?. [Spray sound.] Killing bugs? No. [Spray sound.] Deodorizing the bathroom? No. [Spray sound.] Checking for explosives, yes. Because chemists at the University of Califor
Patients undergoing coronary bypass surgery need implants of new, healthy blood vessels. So do those who receive repeated hemodialysis due to kidney failure. The best option is to use the patient's own veins or arteries, but thousands of patients don
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Solar cells convert sunlight to electricity. But they don't take advantage of all that solar heat, thereby missing out on the majority of the solar ene
Lesson 21 Fur and Paws 第21课 毛和爪子 1. What is it? 1. 它是什么? A cat has fur, paws and a tail. 猫有毛,爪子和尾巴。 fur 毛 paws 爪子 tail 尾巴 2. Let's sing a song. 2. 来唱一首歌。 I saw a dog in a purple hat, On
Research Breakthrough for Biodegradable Tires? 研究人员研发完全可降解轮胎 Researchers say they have created a new synthetic rubber that could be used to make biodegradable tires. A team at Texas AM Universitys campus in the Gulf nation o
By Anita Elash Paris 25 June 2007 A conference in Paris aimed at finding a solution to the crisis in Darfur has ended with an agreement to coordinate future measures in the troubled region. But as Anita Elash reports for VOA from Paris, most of the k
'Smart' Bandages Could Heal Wounds More Quickly 智能绷带有助更快治愈伤口 Simple bandages are usually seen as the first line of attack in healing small to moderate wounds and burns. But scientists say new synthetic materials with embedded
By Noel King El Fasher, Sudan 05 June 2006 Sudanese children collect water from a well in the village of Brikatouly in South Darfur, Sudan The international community is pressing the parties in Sudan'
By Peter Fedynsky Moscow 04 March 2008 The government of Ukraine will meet Wednesday to consider options in the face further reductions in natural gas deliveries from Russia. VOA Moscow Correspondent Peter Fedynsky reports that Russia's state-run ene
The U.S. State Department, responding to Wednesday's International Criminal Court arrest warrant for Sudanese President Omar el-Bashir, said those who have committed atrocities in Sudan should be held accountable for their crimes. The United States
以引人注目的大规模工程(比如纽约海港的瀑布)而知名的艺术家Olafur Eliasson,用空间,距离,颜色和光亮创造了艺术。这个富有想像力的讲座一开始就做一个关于知觉的试验。
By Scott Stearns White House 15 September 2006 President Bush says he is frustrated by the pace of United Nations action to help civilians displaced by violence in Sudan's western Darfur region. Mr. Bush says the world body may have to send in troop
By Noel King Khartoum 06 December 2006 The United Nations and African Union are on high alert in El Fasher, the capital city of northern Darfur. Attacks by militias, known as Janjaweed, have jeopardized the Darfur Peace Agreement. From Khartoum, Noe