单词:
单词: 相关文章
By Cathy Majtenyi Nairobi 31 May 2006 Members of a community group in Kwale District on Kenya's coast show off some of the many local dishes that can be made with the beta-carotene-rich sweet potato The orange-fleshed sweet potato is rich in beta-ca
From VOA Learning English, this is the Health Lifestyle report. There may be something in your food that you cannot see and cannot taste. But it could be killing you. It is an artificial oil commonly called trans fat. Trans fat is a toxic chemical th
Now, even though both of these molecules are made up of exactly the same building blocks, 尽管这两种分子由一模一样的东西组成, they are two completely different substances, and they behave completely differently inside of us. 但它们
By Bill Rodgers Washington, DC 08 September 2006 watch Journalist at Risk Jill Carroll while in captivity Foreign correspondents for western media outlets have always faced dangers in the field. But recently western journalists have become high-valu
By Paul Sisco Washington, DC 08 January 2007 watch Climate report Oil prices are at their lowest levels since mid-2005. That's the good news - or is it? Unseasonably warm weather is responsible for premature cherry blossoms Stronger typhoons, more f
By Catherine Maddux Washington 07 March 2006 watch Africa report While experts worry about a decline in much of the industrialized world's population, sub-Saharan Africa is among the few places where