单词:alfin polymer
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He stopped at the motel. It was late at night. It was almost midnight. He asked the motel clerk, Do you have a vacant room? She said she had a vacant room. He asked how much it was. She said it was $100 for the night. But the night is half over, he s
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
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
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
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
Half a Million Syrians Protest in Hama Nearly half a million anti-government protesters filled the streets of the volatile Syrian city of Hama Friday. Two senior foreign envoys visited in a show of solidarity. Rights activists say Syrian security for
'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
今天我们要学的词是halfway。 Halfway, 一半的地方。 The project has reached its halfway point, 这个项目已经做到了一半。 The show is halfway through, 演出已经进行了一半。 We are more than halfway through winter, 冬天
By Peter Fedynsky Washington, D.C. 15 December 2006 watch Human Rights report Secretary of State Condoleezza Rice has announced initiatives to protect human rights activists worldwide against government repression. As VOA's Peter Fedynsky reports, t
ar door slams, it's been a long day at work I'm out on the freeway and I'm wondering if it's all worth The price that I pay, sometimes it doesn't seem fair I pull into the drive and you're standing there And you look at me And give me that come-here