单词:bod(bio-chemical oxygen demand)
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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
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Grab my hand take one step Come with me no regrets 'Coz we'll fly higher than what you can imagine When your heart is mine, anything can happen You're my baby I know you hear this song No need to worry about us You ain't doing nothing wrong Coz latel
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Twelve million glasses is a lot of glasses. McBurgers is recalling 12 million glasses. The glasses promote the new Shrek movie. The glasses have pictures of the different Shrek characters. They are pretty pictures. But the pictures contain a chemical
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