单词：ecological agriculture
单词：ecological agriculture 相关文章
We used to be a nation of farmers. But now it’s less than two percent of the population in the United States. And so, a lot of us don’t know what it takes to grow food. Over 12 thousand years ago
其他文化
This is the VOA Special English Agriculture Report. Mangroves are unusual looking trees. They have roots that stand in saltwater and look like cables or ropes laid one on top of another. Mangroves are not just pretty -- they help the environment. But
2010年VOA慢速英语(四)月
Agriculture Report - Steps Toward Drought-Resistant Crops, 'Designer' Rice This is the VOA Special English Agriculture Report. A discovery in a laboratory could help lead to new generation of drought-resistant crops. Drought conditions cause plants t
2012年VOA慢速英语(一)月
This is the VOA Special English Agriculture Report. Not all research begins with a plan. Some studies begin by accident. Meredith Schafer says that is what happened with her and Cynthia Sagers. Cynthia Sagers is a biology professor at the University
2010年VOA慢速英语(九)月
Leaders from the world's largest industrial nations are promising more food aid and agricultural assistance for Africa to help ease the impact of rising food costs. VOA White House Correspondent Scott Stearns reports from the Group of Eight summit i
VOA标准英语2008年（七月）
Leaders from the world's largest industrial nations are promising more food aid and agricultural assistance for Africa to help ease the impact of rising food costs. Some non-governmental organizations say increasing demand for biofuels is partly to b
VOA双语新闻 2008年7月