单词：carbon-graphite product
单词：carbon-graphite product 相关文章
The Underhill Farm in Somerset, England, is the picture of rural tranquility. But the lush green pastures disguise the fact that farms like this are contributing to global warming. That's because just one cow can produce up to 500 liters of methane
国家地理2008年
China is exporting the very latest in hi-tech trams to Europe. Four ultra-low floor trams are on their way to Turkey. The trams were designed and built by the China CNR Corporation, one of China's biggest tram makers, which won the bid ahead of Sieme
CCTV9英语新闻2013年11月
The Underhill Farm in Somerset, England, is the picture of rural tranquility. But the lush green pastures disguise the fact that farms like this are contributing to global warming. That's because just one cow can produce up to 500 liters of methane g
自然百科2008年
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)
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)
There is a new substance that is harder than diamond. It's called Q-carbon, and it was created by researchers at North Carolina State University. 北卡罗莱纳州立大学的研究人员研发出一种名为Q-碳的新物质，其硬度比钻石还高
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