单词：transfectant
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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
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This is Morning Edition from NPR news.I am Steven Skip and I am Renee Montagne .Time now for our consumer health segment. Lots of people turn to physical exercise to get their bodies in shape. The concept of reshaping the mind is more elusive. Some
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By Lisa Schlein Geneva 18 September 2006 U.N. Secretary-General Kofi Annan has called on the U.N. Human Rights Council to focus as much attention on the tragic situation in Sudan's conflict-ridden province of Darfur as it has on the crises in the Mi
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By Amy Katz Washington, DC 21 March 2006 watch Smoking Ban report The strictest smoking ban in the U.S. recently took effect in Calabasas, California, a suburb of Los Angeles. The town's mayor says pe
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South African researchers have made a scientific breakthrough in the fight against AIDS with a vaginal gel that significantly reduces a woman's risk of being infected with HIV, the virus that causes AIDS. Experts say the gel could be a revolutionary
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By Jeffrey Young Washington 05 October 2007 While political parties in the United States other than the Democratic and Republican have fielded presidential candidates for years, they have never won the White House. VOA's Jeffrey Young explores how th
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