单词：metallized carbon filament
单词：metallized carbon filament 相关文章
By Gary Garriott Broadcast: November 3, 2003 This is Steve Ember with the VOA Special English Development Report. People have been recycling metals for hundreds of years. Today, re-using metal waste o
VOA2003（下）-发展与科学
Why Diamonds Really Are Forever Diamonds are forever they say, and this is why: diamonds are the hardest substance known to exist. Nothing would scratch or damage a diamond，While a diamond can scratch any other material on the earth. Everything is
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Scientists Use Ancient Shells To Learn About The Past If you were traveling from the United States to Singapore, a guide book could tell you what sort of climate to expect. But if, like paleontologists and geologists, you needed to know what the weat
英语听力文摘 English Digest
ENVIRONMENT REPORT - October 4, 2002: Sport Utility Vehicles By Mario Ritter This is the VOA Special English ENVIRONMENT REPORT. One of the most popular kinds of car in the United States is not really
健康与环境
ENVIRONMENT REPORT– Wildfires Blamed For Climate By George Grow Broadcast: December 20, 2002 This is the VOA Special English Environment Report. A new study has found that major forest fires can inf
健康与环境
WASHINGTON, Nov. 26 (Xinhua) -- U.S. President Barack Obama was hurt in a basketball game Friday morning, and got 12 stitches in his lip, the White House said. Obama got the stitches after his basketball game in the morning with personal aide Reggie
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ANNOUNCER: Welcome to the VOA Special English program, People in America. Today, Sarah Long and Bob Doughty tell about the inventor Thomas Alva Edison. He had a major effect on the lives of people around the world. Thomas Edison is remembered most f
VOA慢速英语2007年（三）月
Study: Reducing Soot is Fastest Way to Slow Climate Change A new study finds that reducing carbon-rich soot emissions could be the fastest and most economical way to slow climate change and protect human health. Those dust-like particles released in
VOA标准英语2011年(九月)
Is it simply the byproduct of a crude mechanical action? 它仅仅是一个粗糙机械制作的副产品？ Or is it an imitation of one half the set of sounds we make to express disappointment? 或者对我们抒发不满的一种声音的一半所进
TED演讲商业篇
The Time Before Fire What is fire anyway? Well, fire is rapid oxidization . Its the energy released when oxygen atoms start combining with carbon and hydrogen atoms. Exactly, so without oxygen in the air, nothing burns. You mean there was a time befo
英语听力文摘 English Digest
DEVELOPMENT REPORT - Reusing Metal Waste Provides Work For Many in Developing Countries By Gary Garriott Broadcast: Monday, April 04, 2005 I'm Gwen Outen with the VOA Special English Development Repor
农业与发展
By Cathy Majtenyi Nairobi 03 November 2006 The United Nations' Climate Change conference is set to open in Kenya's capital Monday. Topics expected to be covered include how countries can cope with increases in global warming and why the United State
2006年VOA标准英语（十一月)
Today, the Minister for Climate Change, Nick Smith, introduced an ETS Emissions Trading Scheme bill into Parliament. This will change the ETS that the Labour government passed. Dr Smith said that it was important not to be too tough on industry becau
新西兰英语
Topics: Famous Americans: Booker T. Washington; things Americans believe are lucky; horribly versus terribly versus awfully; full tuition reimbursement; carbon copy Words: freedmen peer activism accommodating desegregation historically black universi
美语听力 English Cafe
What Causes A Can Of Food To Swell? 罐装食品膨胀的原因 Most of us are cautious eaters. If youre munching grapes, youll probably skip one thats all shriveled and discolored in favor of the round, healthy ones. Likewise, when you choose a can
英语听力文摘 English Digest
The Most Successful Species on Earth 地球上最成功的物种 For many scientists, a species success is measured by sheer numbers. In that case, the most successful species known to man is a type of bacterium known as S-A-R-11, or SAR-11 for short
英语听力文摘 English Digest
Why Teflon Is Slippery？ 1954年，法国工程师马克格雷瓜尔(Marc Gregoire)的妻子柯莱特(Colette)突发奇想，觉得丈夫用来涂在钓鱼线上防止打结的不粘材料特氟龙(Teflon)如果可以用在煎锅上，效果一定不错
英语听力文摘 English Digest
Science and technology 科学技术 3D printing 三维压制 A third-world dimension 第三世界的发展空间 A new manufacturing technique could help poor countries as well as rich ones 一项新的制造技术能够对贫困国家有所帮助，就
经济学人科技系列
The Mystery of Photorespiration 光呼吸作用之谜 光呼吸作用-Photorespiration是所有行光合作用的细胞（该处细胞包括原核生物和真核生物，但并非所有这些细胞都能运行完整的光呼吸）在光照和高氧低二
英语听力文摘 English Digest
What Is Fire? 火是物质燃烧过程中散发出光和热的现象，是能量释放的一种方式。火焰分为焰心、中焰和外焰，温度由内向外依次增高。燃烧过程必须有可燃物、燃点温度、氧化剂三项并存，缺一
英语听力文摘 English Digest