单词:polymer(ide)
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Do you ever get angry at people walking slowly in front of you? If you do, you might be suffering from Intermittent Explosive Disorder (IED). A University of Hawaii professor, Leon James, has studied peoples emotions as they walk along busy streets i
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
Todd: You know, Greg, you were talking about being lost in Thailand. I have my own story about being lost in Bangkok. Greg: Really? Todd: Yeah, I was supposed to go and stay with some Thai friends in Thailand and I was coming from America and I had a
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
The girl got up on the horse. It was a brown and white horse. It was a big horse. She sat on the horses back. She was taller than her father. She looked down at her father. Daddy, you are shorter than me, she said. Her daddy said, Yes, you are taller
歌曲: Where Do You Run 艺人: D-Side 音乐星级: ★★★★★ 所属专辑: Stronger Together 发行年代: 2004 风格: Pop 介绍: D-Side与Boyzone、Westlife等同样来自於男生偶像超级梦工厂的爱尔兰,是个由Ryan ORian雷恩,ShaneCreevey夏恩、Derek Moran德瑞克,Dam
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
US Criticized by All Sides in Egypt On the streets of Cairo many are angry over Washington's inaction as to whether the military's ouster of President Mohamed Morsi was a coup - an important legal distinction that would affect U.S. aid to the country
'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
HEALTH REPORT -July 10, 2002: Acrylamide in Fried Foods By Nancy Steinbach This is the VOA Special English Health Report. Twenty-three international health experts say they are concerned about the pos
Tom: I don't know what to do for my next holiday. Have you ever tried rafting? Joel: Yeah, actually. I was a camp counselor one time for this high school program and we did a week long rafting trip in Utah. I can't remember the name of the river, but
Todd: So, then we go back to the airport. I don't know what to do because I'll be back where I started and I see a hotel. A big hotel, right next to the airport and I tell the cab driver to go there, and so he goes and there's a bellman, you know, wa
Jessica: Ashley have you ever been horsebackriding? Ashley: Yes, I've actually been horseback riding a numbr of times. My grandparents have horses and my uncle. Actually, there was this one time where I was in Idaho visiting for the summer and my unc
Adrienne: I understand you recently rode a train from Milwaukee to Minneapolis. Was this the first time you ever rode a train? Vivian: No, I have been on a train many times as a young person but recently in the past 3 or 4 years I have ridden a train
Todd: Hey, Akane, the other day we were coming home on the bus and I got off the bus and I thought you were on the same bus as us, but when I started walking home, you weren't around. What happened? Akane: Well, it's kind of a funny story actually. I