单词：graphite gas-cooled reactor
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Passage 21 Soils There are many different kinds of soils. Different soils have different types of rock and minerals in them than other. Some soils have more water in them than others. Some soils might have more plant and animal material in them, too
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AGRICULTURE REPORT – January 15, 2002: Growing Wheat By George Grow This is the VOA Special English AGRICULTURE REPORT. Studies show that there will be nine-thousand-million people in the world by t
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Pioneering Soil Researcher Wins Top Environment Prize Biologist Diana Wall went to the ends of the earth - the seemingly lifeless Antarctic desert - to study the life in soil. What soil life does for us, it provides us with many benefits that we don'
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They may be a little safer here. But the food in the forest is far less nutritious than on the riverbanks. If they want to eat well and avoid wolves this winter, they'll need to keep on moving. As the elk move gradually downwards, they follow the riv
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Reclamation projects in some Chinese coastline cities have become shortcuts to develop local economies. With lower costs, local governments usually encourage real estate developers to reclaim land from the sea, but at the same time, such model has al
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We are rediscovering the enigmas(谜团) of the Moon and they're really in our own backyard Dr Jim Garvin, Nasa Goddard Space Flight Center Moon water has world in a twitter A surprising amount of water has been found to exist in the Moon's soil. Data
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