单词：nocera
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Scientists at the Massachusetts Institute of Technology (MIT) have created what could be a breakthrough in providing clean, alternative energy. Researchers have invented an artificial leaf that splits water into hydrogen and oxygen and stores the ene
创新英语
This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan
Scientific American(八)月
Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani
VOA标准英语2011年(四月)
JUDY WOODRUFF: Millions of viewers began tuning into college basketball's March Madness games today. Billions of dollars are paid for the TV rights. Last year, an average of 11 million people tuned in throughout the month. And yet one question looms
PBS访谈娱乐系列
JUDY WOODRUFF: Millions of viewers began tuning into college basketball's March Madness games today. Billions of dollars are paid for the TV rights. Last year, an average of 11 million people tuned in throughout the month. And yet one question looms
PBS访谈娱乐系列