标签：Carbon Dioxi 相关文章
But even harder than the technological troubles are the political ones as preposterous as it might sound to many of us 但在技术难题之外 更复杂的是政治难题也许看起来有点荒谬 there are great many people claim that climate chan
公众人物毕业演讲
On a restricted site in northern Wisconsin, the hissing you hear is helping scientists see the future. Inside towering rings of pipes, aspen, birch, and sugar maples feed on measured diets of greenhouse gases. Our studies were looking at what forest
国家地理2007年
数千年来，大气中碳12和碳14的比例是稳定不变的，然而，二十多年以来的原子弹试验，使得碳14的水平增加。生长中的葡萄吸收了空气中的二氧化碳，而通过测试葡萄中的碳含量，就可以大致
60秒科学
Broadcast: Feb 7, 2003 By George Grow This is the VOA Special English ENVIRONMENT REPORT. A private North American group has launched an effort to reduce and trade releases of industrial gases linked
VOA2003（上）-社会广角
The U.S. space agency NASA says this year has been the warmest for the earth in 131 years. And a new study of hot weather in the U.S. released by the National Wildlife Federation predicts that extreme heat will be the norm by 2050. The private enviro
VOA标准英语2010年(八)月
China builds first tower-type solar-thermal power station BEIJING, Nov. 12 (Xinhua) -- The first tower-type solar-thermal power station in Asia has been built in northwest Beijing, chief of the program said on Monday. Wang Zhifeng, a researcher at th
英语新闻
NASA Keeping Watch on the Earths Health 美国国家航空航天局保持关注地球的健康 The past year has been the busiest 12-month period for the American space agency in more than 10 years. The National Aeronautics and Space Administration,
2015年VOA慢速英语(二)月
India says it is satisfied with outcome of the recent climate summit at Copenhagen, which did not spell out specific targets for reducing carbon emissions. India is hailing the united position adopted by big developing countries at the summit. Anjana
VOA标准英语2009年(十二月)
New Ways of Tracking Greenhouse Gas Emissions Developed With more than 18 million people living, working and driving in Los Angeles, the city often is covered in a hazy layer of smog. Stan Sander, senior research scientist at the U.S. space agency's
VOA标准英语2013年(七月)
海洋雪有助预测气候变化 As if materializing from a different dimension, the submersible device called PELAGRA slips below the surface and sinks into a research pool at the National Oceanography Centre, in Southampton, England. 位于英格兰
VOA标准英语2016年(一月)
DAVID GREENE, HOST: Come with us on a journey inside the Earth. Well, inside a special layer in the Earth. A quarter of the Northern Hemisphere is covered with what's called permafrost, and for the first time in centuries, the permafrost is beginning
2018年NPR美国国家公共电台1月
And how, you may reasonably wonder, can scientists know what oxygen levels were like hundreds of millions of years ago? 你也许有理由想知道，科学家们怎么会知道几亿年以前的氧气浓度？ The answer lies in a slightly obscure b
万物简史
The secret of the diamond lies in the carbon bond. Carbon is one of the most plentiful substances known to science. We find carbon in plants, animals and our bodies. Carbon everywhere. And yet diamonds are some of the rarest, most beautiful of all su
自然百科2009年
Our planet was spared this fate. The magnetic field generated by the Earths core blocked the solar wind, preventing it from blasting away the fragile air. But the Earths atmosphere was still very different from the one we breathe today. It contained
探索与发现2014年
Hi, everybody. 大家好！ I'm here at Children's National Medical Center in Washington, D.C., visiting with some kids being treated here all the time for asthma and other breathing problems. 此刻，我在华盛顿特区的国家儿童医疗中心，
奥巴马每周电视讲话
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
We began with the meeting with Premier Wen Jiabao, and I was frankly a little surprised he was so focused on US-China Clean Energy Cooperation, framing it in part as important for the US-China relationship, and then also as important for advancing th
英语杂谈
Time magazine included the Yike Bike in their list of the 50 Best Inventions for 2009. The Yike Bike is an electric bike which folds. It weighs about 9kg and has a battery which charges in about 20 minutes. You sit up straight on a Yike Bike holding
新西兰英语
Cement is a major component of concrete, the world's most widely used man-made material, an integral part of roads, bridges and buildings. But making cement requires heating limestone and other materials to very high temperatures, a process that rele
VOA标准英语2010年(一月)
People have been sharing photos of the blue skies in Beijing on the Internet over the past few days. Posts on the topic of Beijing Blue Sky have been viewed millions of times on social media. Su Wei from the National Development and Reform Commission
2015CRI中国国际广播电台