单词：ionic device
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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
英语专业四级听写
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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Y: 各位听众好，欢迎到美语咖啡屋。我是杨晨。 J: Hello I'm Jody and welcome to American Cafe. Hey Yang Chen, you seem pretty deep in thought today. Y: 我这几天一直琢磨，政治
美语咖啡屋
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'
VOA标准英语2013年(四月)
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
自然百科2012年
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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