单词：prepolymer
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英文魔法师字源大挪移
IN THE NEWS - John Kerry Chooses John Edwards for Vice President By Cynthia Kirk Broadcast: Saturday, July 10, 2004 This is Bob Doughty with In the News, in VOA Special English. The Democratic Nationa
教育与新闻
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
Scientific American(四)月
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
Scientific American(三)月
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
Scientific American(一)月
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
60秒科学
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
Scientific American(九)月
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
Scientific American(二)月
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
Scientific American(四)月
The Secretary of the US Army delivers a stinging indictment today against those accused of sloppy record keeping at Arlington National Cemetery. And John McHugh tells the families of those resting in that hallowed ground that he is deeply sorry. Toda
2010年NPR美国国家公共电台6月
When I work with students in conferences I spend most of my time helping them unearth and add details, helping them identify areas needing further development. While we are struggling to make sentences and structure our paragraphs, it's easy to forge
实用英语
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
2016年VOA慢速英语(九)月
'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
VOA标准英语2016年(二月)
By Kurt Achin Seoul 25 February 2008 The former Seoul mayor who swept December elections in South Korea is getting used to his new title: Mr. President. Lee Myung-bak has taken his oath of office in a formal ceremony in the South Korean capital. VOA
VOA常速英语2008年（二月）
SAN FRANCISCO, Oct. 10 (Xinhua) -- Apple announced on Monday that pre-orders of its iPhone 4S have topped 1 million in a single day, surpassing the previous single-day pre-order record of the company's smartphone. The iPhone 4S pre-orders surpassed 1
英语新闻
今天我们要学的词是 pre-order. Pre-order 预购。iPhone5问世了。The iPhone5 went on pre-order just after midnight Pacific time last Friday. iPhone5 于美国西部时间上星期五凌晨12点一过开始预售。Roughly one hour after t
英语单词荟萃
NEW YORK, Sept. 23 (Xinhua) -- The NBA announced the cancellation of 43 pre-season games and the postpone of training camps indefinitely. The representatives for the NBA owners and players union are still at an impasse over a new collective bargainin
英语新闻
BEIJING, Aug. 22 (Xinhuanet) -- U.S. Emmy award-winning actress Selena Gomez will host the MTV Video Music Awards pre-show on Aug. 28, according to media reports Monday. Along with a cadre of MTV personalities and rock act Cobra Starship, Gomez will
英语新闻
BEIJING, April 19 (Xinhuanet) -- Almost one year after the disastrous（灾难性的 ） oil spill, scientists believe that the overall health of the Gulf of Mexico as nearly back to normal. However, the scientists restrain their optimism about natur
英语新闻
The suicide bomber who killed 7 CIA employees on a US base in eastern Afghanistan was seen, on Saturday, in a pre-attack video alongside Pakistani Taliban chief Hakimullah Mehsud. In the video, Humam Khalil Abu Mulal al-Balawi, a Jordanian, says he w
VOA标准英语2010年(一月)