单词:aluminum alginate fiber
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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
AMERICAN MOSAIC - An Explosion of Color at the National Cathedral Flower Mart; Sheep and Wool Celebrated at Maryland Festival JUNE SIMMS: Welcome to AMERICAN MOSAIC in VOA Special English. (MUSIC) Im June Simms. This week on our program we visit two
This is the VOA Special English Development Report. Researchers say they have found a way to extend the storage life of a drug used to treat H.I.V. Their work could give infected mothers in the developing world a new way to prevent the spread of the
Powered Exoskeletons Give Assistance in Walking, Lifting Powered suits that could help paralyzed people walk and others lift and carry heavy loads with ease have been an inventor's dream since late 19th century. But they had to wait until the 21st ce
This is scientific Americans 60-Sencond Science. I am Karen Hopkin. This will just take a minute. When you think about silk, you probably think of gossamer fibers woven into lustrous garments or decadently soft bedsheets. But silk is also prized for
TEST 3 Listen carefully to the conversations and short passages [00:07.99]and choose the best answer to each of the questions. [00:13.56]1.A)She is pitiful. B)She is too shy to apply. [00:33.41]C)They are afraid of her. D)She is intelligent. [00:41.2
China is working on next-generation bullet trains with a maximum operational speed of 400 km per hour that will be ready by 2020 for markets linked to the Belt and Road Initiative, the country's top railway vehicle maker said. 国内最大的轨道客车
Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl
By Melinda Smith Washington, DC 01 November 2006 watch Walter Reed Amputees A record number of U.S. soldiers injured in Iraq have lost arms and legs in explosions caused by remote-controlled bombs. The need for more comfortable, adaptable artificial
The Farnborough International Airshow, held every two years in Britain, is a key event where new planes are displayed and flown and where orders are placed. This year there are indications that commercial aviation may be recovering from a year of los
Several accords signed to boost relations between Turkey and Cameroon Ntaryike Devine, Jr. | Yaounde, Cameroon 17 March 2010 It was the first trip to Africa for the Turkish president, who arrived in Cameroon yesterday accompanied by 120 businessmen,
Online communication tools played a huge role in recent government changes in Tunisia and Egypt. But they also showed how easily governments can interrupt Internet traffic and cell phone transmissions. VOA's David Byrd has this look at the future of
Washington Auto Show Highlights New Technologies 华盛顿车展突出新技术 WASHINGTON At this week's annual Washington Auto Show, manufacturers are featuring their standard models along with cars that point to the future, both in terms of propul
African Music, Interactive Media At Texas Festival At this booth sponsored by the independent music exporters of South Africa, or IMEXSA, South by Southwest participants were able to learn about what that country has to offer. Organizer Renneth Tschi
Giant Airship Could Move Huge Amounts of Cargo The prototype unveiled in this immense World War II hangar near Los Angeles is just half the size of the final working model. But the prototype is massive, at 75-meters-long. It is wide, flattened on the
Ghana Bamboo Bikes Gain Worldwide Attention 加纳竹制自行车得到全世界的关注 APPAH, GHANA Bamboo does not get much respect in Ghana. Farmers see it as a nuisance to be cleared from their land. Construction workers use it to prop up build
助行走外骨骼机器人 Powered suits that could help paralyzed people walk and others lift and carry heavy loads with ease have been an inventor's dream since late 19th century. But they had to wait until the 21st century for the advanced materi
AUDIE CORNISH, HOST: The White House is postponing most of its steel and aluminum tariffs for at least another month. Tariffs were due to kick on - to kick in on a number of countries at midnight tonight. They're part of a broader effort to crack dow
U.S. retail sales fell half a percent in June providing more evidence that the U.S. economic recovery will slow down in the second half of the year. But the weaker than expected consumer spending appeared to have little impact on Wall Street as inves