单词：water-cementitious materials ratio
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Scientists have come up with a revolutionary new use for wood. They have devised a way to make it transparent. This could totally change the way many things in our lives are used and made. See-through wood could one day replace glass and be used in w
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Im Hilarie Barsky for Good Morning America, now my guest is Cindy Crawford. Happy Pre-Mothers Day. oh, thank you, yeah, great. Do your kids do anything special? Er, Im sure I will be getting some object made out of clay. Yeah, I actually, I saw them
访谈录2008
This is the VOA Special English Development Report. This week in our report we are going to talk about adobe. No, not the information technology company in California, Adobe Systems. We mean the traditional building product made of soil and other ma
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Lesson 47 Television Day: The sea TV Commentary: If you looked at the Pacific from a space-capsule you might think that the world was all water. You would hardly be able to see any land at all. Water covers most of the earth's surface. The sea contai
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图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t
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图片1 图片2 by Jason Marshall Despite many peoples assumption to the contrary, math is undeniably artistic. It takes a tremendous amount of creative muscle and artistry to devise mathematical solutions. And, as made evident by their frequent batt
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Scientists Find Large Amounts of Precious Metals in Wastewater In recent months, stories about sewers getting clogged have made international headlines. For example, a so-called fatberg, a mass of grease and diapers, clogged London's sewers. A new st
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This is Scientific American's 60-Second Science. I'm John Matson. Got a minute? Earth's surface is dominated by oceans. But where did all that water come from? Asteroids and comets smashing into the early Earth have long been thought to be a promisin
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It is very fashionable and proper to speak about food in all its forms, all its colors, aromas and tastes. But after the food goes through the digestive system, when it is thrown out as crap, it is no longer fashionable to speak about it. It is rathe
英语语言学习
DEVELOPMENT REPORT - Adobe By Gary Garriott Broadcast: Monday, July 19, 2004 This is Robert Cohen with the VOA Special English Development Report. These days, stories about adobe are usually about Ado
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AGRICULTURE REPORT - Compost: an Organic Way to Better Soil and Crops By Gary Garriott Broadcast: Tuesday, July 05, 2005 I'm Gwen Outen with the VOA Special English Agriculture Report. Many farmers im
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[英语语法手册]非限定动词G 动名词和现在分词用作定语时的区别 动名词用作定语时，和它所修饰的名词在逻辑上没有主谓关系，即它不是该名词的动作。
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1. Netherlands was started using full-body scans for airliner passengers going to the US after a man passed through the Amsterdam airport with explosives to attack the only one jet approach to Detroit. Private delegate calls the scanning unavoidable
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BEIJING, May 13 (Xinhuanet) - China's central bank announced on Saturday it would lower the reserve requirement for commercial lenders by 50 basis points, the second time it has taken such action this year to inject more market liquidity and shore up
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Japan has defended its food exports as healthy amid global fears that the countrys nuclear disaster has contaminated its dairy products, fruits and vegetables. Leaders of Southeast Asian nations met with Japanese officials in Indonesia to discuss sup
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China's sex ratio is quite worrying nowadays. According to census data, China's sex ratio at birth was 108 males to every 100 females in the early 1980s, only slightly above the natural rate of 103 to 107. In 2000 the ratio was 116.9 males to 100 fem
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Voice 1 Welcome to Spotlight. I'm Christy VanArragon Voice 2 And I'm Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand no matter where in the world they live. Voice 1 Every day more people in t
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Voice 1 Welcome to Spotlight. Im Liz Waid. Voice 2 And Im Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 It has been a long day. You have wor
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Don: Hey, Yael, Have you heard? We've discovered two new oceans? Yael: Where? D: On Mars. Well, they aren't there any longer, but they were there a few billion years ago. Y: I thought scientists weren't sure if Mars had oceans or not. D: They weren't
英语听力文摘 English Digest
Ya?l: I've got a good trivia question for you, Don. Don: OK, Ya?l. Y: What animal's beak is one of the hardest known organic substances? D: Umm . . . I don't know. The bald eagle? Y: Nope. It's the giant squid. A squid beak can reportedly snap throug
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