单词:natural polymer fibres
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插座、插头和其它连接物(电器连接) Sockets, plugs and other contacts [electric connections] 插头、插座及其他接触器(电接头) Plugs, sockets and other contacts [electric connections] 表面覆有带电导体的玻璃 Glass
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
Epidermal growth factor - a cytokine that stimulates epithelial cell proliferation. Epinephrine - a neurotransmitter substance found at all adrenergic synapses (nor epinephrine or epinephrine). It is
Code - the code of nucleotides is written in
Rest Position - a position the jaw adopts when at rest with the lips lightly together. Reticular fibres - are fine type III collagen fibres forming a net-like supporting framework or reticulum. They a
Sesamoid bone - a small bone which appears at the age of thirteen, adjacent to the carpo-metacarpal joint of the thumb and is of use in determining the skeletal age of a child. Sharpey's fibres. - are
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
[00:04.70]Lesson 77 [00:08.25]1.Dialogue [00:12.93]Susan is asking Mrs Zhu about the development of printing in China. [00:20.30]What happened before printing was invented? [00:24.84]People had to use other ways to record information. [00:29.60]In th
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
'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
Lesson 67 A Talk About Wool 第67课 羊毛漫谈 When we take a country walk in the spring-time, we see the sheep, with its thick, warm covering of wool. But when we see it in summer, its wool is very short. In June the farmer's men wash the sheep,
A single fibre of wool is very weak, but by means of a machine these fibres are twisted together to make woollen yarn, which is a strong, loose thread. This twisting together of the fibres is called spinning. The fibres are curly or wavy, and are als
Lesson 63 The Useful Cocoa-nut 第63课 有用的椰子 Cocoa-nuts grow in clusters at the top of a palm-tree which is found in most hot countries. This palm has a slender brown stem, sometimes from sixty to ninety feet high, without branches, but be
Lesson19 A reel of cotton 第19课 一卷棉线 Let us take some of the white cotton off this reel, and try to find out what the thread of cotton is made of. We can pull the white thread to pieces, and then we see that it is made of many short fibres
工业INDUSTRY 工业生产过程Industrialprocesses 制铝工业Aluminiumindustry 适用技术Appropriatetechnology 高炉Blastfurnaces 纤维素Cellulose 化学工业Chemicalindustry 清洁技术Clea