标签：antibiotics 相关文章
By Carol Pearson Washington 28 February 2007 watch Antibiotic Resistance report Penicillin and Erythromycin are examples of antibiotics that used to be one-time miracle cures. These drugs and other antibiotics are now less effective because bacteria
2007年VOA标准英语（二月）
Farm-Raised Fish Must Double to Meet Growing Global Demand 鱼养殖场需加倍投入以满足全球不断增长的需求 IMPERIAL, CALIFORNIA As the world population grows, there is a growing need for more food - including seafood. By 2030, the Wor
VOA标准英语2014年(六月)
Unit 64 The Story of Corn Before 1492, when Columbus discovered America, no one living in Europe knew corn existed. Up to this time, corn grew only in the Americas. Scientists believed corn was originally cultivated by Indians in the highlands of Mex
英语流行话题阅读：语境识词4500
Feeling down? Youre not alone. If depression seems pretty common, it is. One in every ten adults suffers from depression. And thats what has scientists puzzled. If depression is a detrimental condition, why is it so rampant in the population? Some sc
英语听力文摘 English Digest
By Jessica Berman Washington 28 December 2006 Egypt's boy king Tutankhamun probably died of an infection caused by a broken leg and not a blow to the head as commonly believed. The finding was reached by an international team ofscientists that perfo
2006年VOA标准英语（十二月）
By Carol Pearson Washington 28 March 2007 watch Stent Study report A new, landmark study finds heart stents devices used to open blocked arteries - may not be as effective in the long term as medication in preventing heart attacks. VOA's Carol Pears
2007年VOA标准英语（三月）
By Jessica Berman Washington 19 March 2007 Transgenic mosquito Scientists say they are a step closer to showing that it may be possible to genetically alter mosquitoes to control malaria, a disease that kills more than a million people in developing
2007年VOA标准英语（三月）
AZUZ: Romaine is another type that's getting attention for the wrong reason. The U.S. Centers for Disease Control is warning that a recent E. coli outbreak is connected to romaine lettuce. And this outbreak looks to be pretty widespread. It's affecte
CNN美国有线新闻2018年6月
By Carol Pearson Washington, DC 08 November 2006 watch Heart Stent report Heart stents are lifesaving medical devices that help prevent heart attacks. Most of these stents are coated with various drugs, but mounting data suggest drug-coated stents c
2006年VOA标准英语（十一月)
Dear Annie: My sister and brother use too many antibiotics. And they both use only as many pills as they need to feel better and save the rest. I've told both of them that abuse of antibiotics is the No. 1 reason we have superbugs that won't be cured
英语听力文摘 English Digest