单词：chromatograply
单词：chromatograply 相关文章
Food prices continue to rise, threatening to push more and more people into poverty and hunger. A new report from the UN food agency says one of the best ways to boost agricultural productivity worldwide would be to remove the barriers women farmers
VOA标准英语2011年(三月)
In Fast-Moving World, Slow-Going Barges Ply US Waterways These days, words like speed, flexibility, and high-tech describe the American culture - and a lot of the nations business operations. But not one thats based on the nations inland rivers. The
VOA标准英语2012年(二月)
This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Traditional fisheries may no longer be the world's most important provider of fish. A new United Nations report shows that fish farming or aquacultur
2011年VOA慢速英语(二)月
Hungrier Planet Strains Water Supply Thirsty food Water. As the population grows, there are more and more people at the tap every day. But when it comes to the worlds demand for water, drinking it is just the beginning Food - and agriculture in parti
VOA标准英语2012年(三月)
Global Warming Might Threaten Water Supply Stanford University climate expert Noah Diffenbaugh led the study, which compares snowpack conditions across the northern hemisphere in the late 20th century with climate model projections for the next one h
VOA标准英语2012年(十一月)
The $280 glasses, developed by a Berkeley firm, were discovered by accident, and allow sufferers to see colours which were previously muddled and muted. 这款由伯克利（Berkeley）公司开发的眼镜售价280美元，发明过程纯属偶然，能
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