单词:accumulation of organic matter
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Podcast is sponsored from the people of American Chemistry, who provide the plastics, medicines, and innovations that make life modern. Learn more at americanchemistry. com. This is Scientific American's 60-Second Science, Im Karen Hopkin. This will
(man) Today I want to discuss fossil fuels such as coat, oil, and natural gas. The term fossil fuel refers to the trapped remains of plants and animals in sedimentary rock. You see, living plants trap energy from the sun by the process of photosynth
The subject of many people's conversations is the flu. Everybody is talking about it. The clinics and hospitals are full of people who have flu symptoms, and supermarkets have shelves full of medicines, tissues(1), and vitamin powders. I've been luck
Topics: American Authors Rachel Carson; the board game Monopoly; gas guzzler and other car descriptors; money order; way to establish or way to establishing Words: conservationist environmental movement pesticide to eradicate compelling indiscriminat
WASHINGTON, July 5 (Xinhua) -- David Beckham will sit out the next game after he received a ban from Major League Soccer on Thursday for kicking a ball at an opponent in the Los Angeles Galaxy's loss at San Jose. Beckham kicked a ball at San Jose's S