单词：alternative optimality
单词：alternative optimality 相关文章
This is Scientific Americans' 60-Second Science. Im Steve Mirsky. Got a minute? The search for alternative fuels to gasoline has led to surprising possibilities, for instance, the waste oil for making French fries. But one of the most unusual alterna
Scientific American(一)月
When the wind picks up at the foot of the Rockies, there are those who believe they can hear the future. At the National Renewable Energy Laboratory, making alternative power sources competitive with fossil fuels has been a mission since the energy
国家地理2008年
By Katherine Cole Tres Chicas is a rarity on the music charts: A vocal group in which all three singers are frontwomen in their own right. And don't get ready to rumba, because despite their Latin nam
VOA2004（下）--文化艺术
China's energy production relies heavily on coal-fired power stations. As the world's highest emitter of greenhouse gasses, China consumed more than 400 million tones of coal last year. As many parts of China have been shrouded in a gray haze over th
英闻天下
By Jerilyn Watson Broadcast: July 17, 2003 This is Bill White with the VOA Special English Education Report. Some young people in the United States attend 1)alternative schools. These are schools that
VOA2003（下）-教育与新闻
今天我们要学的词是 alternative. Alternative 作为形容词，意思是另外的，可以用于替代的。Stephen Hawking predicts that planet Earth will only survive another 100 years, and it's urgent to consider an alternative planet. 霍金
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