单词：early mature valley
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HEALTH REPORT — April 10, 2002: Treating Osteoporosis By Nancy Steinbach This is the VOA Special English Health Report. Medical researchers say they may have found a new effective treatment for the
健康与环境
pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
医务英语
By Melinda Smith Washington, D.C. 02 January 2007 watch Proton Pump report A basic tenet often associated with the practice of medicine is that physicians do no harm.' But even with the best intentions, sometimes a drug prescribed for one ailment ca
2007年VOA标准英语（一月）
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
Scientific American(四)月
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Aspirin is a popular painkiller, and chances are you have some in your medicine chest right now. You might even have some in your flesh-and-blood, put-a-
Scientific American(一)月
八种食物 你的胃伤不起 从理论上讲，人们应该可以消化放到嘴里的任何类型的食物。但是食物处理和加工方式的变化(如油炸)以及生活方式的变化(如久坐不动)意味着我们的胃并不总能很好地
实用英语