单词：soils in use for cropland
单词：soils in use for cropland 相关文章
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
农业与发展
This is the VOA Special English Agriculture Report. Villagers plant trees in China's Gansu province last year in an effort to control the spread of deserts Desertification is a process. It changes productive land into useless land. One example of des
VOA慢速英语2008年（四）月
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
In the United States, the typical crop travels nearly 2,500 kilometers from field to table. While U.S. consumers express growing interest in local foods, farmland near urban areas is increasingly unaffordable. These challenges have led a school bus
VOA标准英语2008年（十月）
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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