单词：high-strength carbon fiber
单词：high-strength carbon fiber 相关文章
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Athletes have obviously been tempted to use performance enhancing anabolic steroids. Drug testing may discourage such use. But a new study finds that some of the perfo
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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
By Melinda Smith Washington 18 July 2007 We are going to find out about two studies on breast cancer. One studied whether a diet very high in fiber and low in fat could reduce the risk of recurring breast cancer. Another study focused on women with a
2007年VOA标准英语（七月）
Showcase of 155 films offers fresh perspective on green, climate change issues Penelope Poulou | Washington, DC 26 March 2010 Photo: Esben Hardt/Ace Ace If global warming continues at the same rate as today, by the end of this century, the Arctic cou
VOA标准英语2010年(三月)
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
Chinese Academy of Sciences successfully launched a new sounding rocket, Kunpeng-1B, in Hainan Danzhou early Wednesday. The rocket reached a flight height of 300 kilometers for the first time. Its arrow configuration of altitude control system and ca
cctv9英语新闻2016年