单词:saturated water content
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路易斯安那遭遇历史性洪水 已致11人死亡 play pause stop mute unmute max volume 00:0002:14repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin. O
The U.S. state of California has been suffering a historic drought. Three years ago, its governor declared a drought state of emergency. Late last year, 97 percent of California was in drought. But today, the U.S. drought monitor says less than 60 pe
The northeast just had its first big snow of the season. Meanwhile, on Titan, it was foggy. That weather report brought to you by researchers publishing in the journal Astrophysical Journal Letters. The scientists found that Titan, Saturns largest mo
Unit 13 The Culture Content of Vocabulary One of the earliest word sets that a student will learn is colors. Later on the intermediate student learns that in English yellow signifies cowardice and green signifies inexperience and jealousy. It is impo
Agriculture Report - Getting to the Root of How to Water Trees This is the VOA Special English Agriculture Report. Some trees can survive a long time without water. Think of trees that grow in the desert. But other trees may need more moisture than t
Floods Challenge Midwest Farmers On his land outside Peoria, Darrel Kammeyer is keeping one eye on the rising Illinois River and another on the only thing standing between it and his farmland, a seven-meter-tall levee. It was constructed to hold back
Welcome to This I Believe, an NPR series presenting the personal philosophies of remarkable men and women from all walks of life. For our series This I Believe, we receive thousands of essays from young people. Today we hear from one of them. Kamaal
台湾籍旅美老师今天交给我们的句子是: I have a dream,that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character. 我有一个梦想,那就
Fog Found on Saturn's Moon Titan A study in Astrophysical Journal Letters reveals that Titan may be home to the familiar atmospheric condition known as fog--but made out of methane. Karen Hopkin reports The northeast just had its first big snow of th
Facebook published detailed guidelines Tuesday for what users can and cannot post on the social media service. Earlier this month, lawmakers called on Facebook chief Mark Zuckerberg to appear in Congress. They demanded that his company take more step
[00:00.00]absence achieve act [00:03.24]n.缺席,不在 vt.完成;达到 n.法令;条例;行为 [00:06.48]advance advanced affair again and again [00:11.19]vt.vi.推进;促进 adj.先进的;高级的 n.事情;事 反复地;再三地 [
Will There be Enough Water for Everyone? As the global population grows, so does the need for water. The Worldwatch Institute says increased demands for food, energy and industry, along with climate change, could lead to water scarcity in some places
解决非洲水和燃料的办法 Governments of developing countries in Africa often lack the resources and infrastructure to solve the everyday problems of their inhabitants. But every so often, authorities and local entrepreneurs find low-tech sol
Low-tech Solutions Found for Africa's Everyday Problems 低技术含量的解决方案解决非洲日常问题 Governments of developing countries in Africa often lack the resources and infrastructure to solve the everyday problems of their inhabitan
RACHEL MARTIN, HOST: It used to be the only place to find great television was on the big broadcast networks, then cable was where all the best stuff was airing. More recently, Netflix and Amazon have been racking up the Emmys. And now Apple wants a
综合性商港comprehensive commercial seaport春意盎然spring is very much in the air forest coverage森林覆盖率 global warming全球变暖 principal element主要因素 toxic emission废气排放www.examw.com 迸发出心灵的火花ignite t
This is Scientific Americans 60-Second Science. I am Synthia Graber. Got a minute? Wander where and when the next major river flood would had, just look up to the satellites. Conventional estimates a river volumes come from rain fall of course and fr
Two-week conference aims to achieve legally binding agreement to cut greenhouse gas emissions and has been billed as last best chance to clinch a deal. Sonja Pace | London 04 December 2009 Smoke is seen emitted from a chimney of the cooling towers of
US satellite observations have produced the first strong evidence for water flowing on Mars. 美国卫星观测找到了火星表面存在液态水的首批强有力证据。 The water is a brine saturated in salts such as perchlorates. As it seeps d
Frost-free Freeze Physics 昇華是指一种物质从固态不经过液态直接转化为气态的过程,是物质在温度和气压低于三相点的时候发生的一种物态变化。与昇華相反的过程称做凝華,指物质从气态直接变