标签:aluminum 相关文章
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
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Airplane manufacturers have been changing over from aluminum to advanced composite materials. These lighter, stronger composites are made of fibers of
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
What I discovered in New York City trash I was about 10 years old on a camping trip with my dad in the Adirondack Mountains, a wilderness area in the northern part of New York State. It was a beautiful day. The forest was sparkling. The sun made the
bauxite, ['b?:ksait] n 铝土矿(铝的基本矿石) 【记】1)Baux是法国地名,xite=site场所。Baux因产铝而知名。 2)baux读:宝库,xite场所。产铝的宝库
Three days later, like turkey buzzards setthug on a corpse, the reporters came. 三天以后,记者来了,像兀鹰落到了尸体上。 Dried and hardened over a slow fire of green wood, the bow was ready. 尸体已在鲜叶燃成的文火上烘干
[00:00.00]Genetically Modified FoodsFeed the World? [00:03.67]If you want to spark a heated debate at a dinner party, [00:08.68]bring up the topic of genetically modified foods. [00:11.75]For many people, the concept of genetically altered, [00:15.46
DEVELOPMENT REPORT - Recycling Scrap Metal Into MoneyBy Gary Garriott Broadcast: Monday, July 31, 2006 This is the VOA Special English Development Report. People have been recycling metals for hundred
Outkast - The Way You Move Featuring Sleepy Brown (流浪者合唱团/用你的方式移动) 年度最佳专辑提名 Boom, Boom, Boom. Heh, Heh. [Big Boi] Ready for action, nip it in the butt. We never relaxin', OutKast is everlastin' Not clashi
We hope to finish today, Tuesday, which is day 69 since our miners got trapped. We are really working as fast as possible to get these miners out. We are not really about declaring mission accomplished. We are basically met the necessary conditions t
You want an example of something toxic? Take a look over my shoulder here. That red sludge spilled out of a reservoir at an aluminum plant on Monday. This happened in the European nation of Hungary. This stuff is toxic. Around 250 people had to leave
More people are still losing jobs faster than they're finding them. This morning, the Labor Department released its September employment report. Ninety-five thousand jobs went away last month and kept the unemployment rate stuck at 9.6 percent. It wa
Tariffs Could Hurt US Beer Industry Dan Katt opened his beer company, Good City Brewing, in Milwaukee, Wisconsin in 2016. At the time, it was a presidential election year. He did not think about the possibility of a trade dispute between President Do
This is the VOA Special English Development Report. One of the best ways to protect yourself and other people from getting sick is to wash your hands with soap. To make soap, you need three main things: oil, water and lye. The oil can come from anim
DEVELOPMENT REPORT - Working With Clay: A How-to GuideBy Gary Garriott Broadcast: Monday, January 09, 2006 I'm Steve Ember with the VOA Special English Development Report. Clay is found almost everywh
美国航空航天局科学家测试新型飞机 The U.S Aeronautics and Space Administration, NASA, is commonly associated with space exploration, but aeronautics is still a big part of the agencys research. Engineers at its Aeronautics Research Cen
火山爆发 The Eruption of Volcano abundant adj. 丰富的,富余的 accretion n. 增长 accumulation n. 积聚,堆积物 active volcano 活火山 Alaska Volcano Observatory 阿拉斯加州火山观
Katie Couric:...want you to meet someone a lot closer to home, Michael Sessions. He is a high school senior, but his biggest headache isn't the prom or even math class, although recently for him , lif
As you might expect, oxygen is our most abundant element, accounting for just under 50 percent of the Earth's crust, 你也许会想到,氧是最丰富的元素,占地壳的将近50%。 but after that the relative abundances are often surprising.