单词:classs-h insulating material
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material scientists admire spider silk for being lightweight and strong.now another arthropod product is getting into the act insect cuticle,the tough flexible material is inside insect skeleton.researchers at harvard * institute for biological inspi
[00:03.89]You will hear three pieces of recorded material. [00:08.75]Before listening to each one, [00:12.90]you will have time to read the questions related to it. [00:17.55]While listening, [00:20.72]answer each question by choosing A, B, C or D. [
It Never Rains In Southern Claifornia Got on board a westbound seven forty seven Didn't think before deciding what to do Ooh, that talk of opportunities, TV breaks and movies Rang true, sure rang true
This is Scientific American's 60-Second Science. I'm Karen Hopkin, this'll just take a minute. On February 8th, we told you about scientists who had created a device worn over the knees that could harvest the energy you otherwise waste while walking.
The warm waste environment of your mouth makes it a great place for bacteria, some of which keep busy causing cavities. Such dental difficulties were thought to a really taken-off for we switch from hunting gathering to agriculture and had a ready su
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 Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. After water, tea is the world's most popular drink. Now three New York City high school students have discovered what maybe a bruing scandal because th
This is Scientific Americans 60-Second Science. I'm Cynthia Graber.This will just take a minute. Imagine giant fields filled with photovoltaic solar panels, soaking up rays. The best spots to put such panels are obviously sunny, with little rain. But
This is Scientific American 60-Second Science. I'm Cindey Graber. This will just take a minute. When TV sets die, they usually end up incinerated or in landfills. But now researchers from Englands University of York believe theyve found a valuable us
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This is Scientific American's 60-Second Science, I am Cynthia Graber. This'll just take a minute. It might look and even feel like paper, but a new material created by scientists at MIT is designed to be an oil spill super-absorber. This technology d
If scientists have their way, we may someday be tapping maplesnot for pancake fixins, but for power. Because researchers from the University of Washington in Seattle have found theres enough electricity flowing in trees to run an electronic circuit.
This is the VOA Special English Education Report. No one likes to make mistakes. But a new study says organizations learn more from their failures than their successes, and keep that knowledge longer. One of the researchers was Vinit Desai, an assist
Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯 In 2004, two scientists at the University of Manchester in England isolated a carbon-based material called graphene, with some unusual properties. Andre
Scientists Create Blackest Material Ever Of all the black things in the universe only the infamous black holes are so black that not even a tiny amount of light can bounce back. But scientists have managed to create material almost as black, and it h
This is scientific American ,60 second science. Im Chris D..ta. Got a minute? In less you have a pair of noise-cancel headphones. Flying can be annoying to the ears. A lot of low-pitch rumbling makes it into the cabin. The problem is ,the wings ,floo
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Today, the Minister of Finance, Bill English, read the Budget in Parliament. The Budget is a plan of how much money the government has and how the government will spend it. For the last few weeks, Bill English has told us some of the things that woul