单词：hypometamorphism
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This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Athletes have obviously been tempted to use performance enhancing anabolic steroids. Drug testing may discourage such use. But a new study finds that some of the perfo
Scientific American(九)月
New Study Could Change Treatment For Asthma Most adults who have mild or moderate asthma are told to use their inhalers twice daily, even if they don't have symptoms. The medicine in those compressed-air inhalers are corticosteroids, which open a per
VOA标准英语2012年(十一月)
By Tony Budny Washington 01 October 2007 U.S. law enforcement officials last week announced their largest crackdown ever on performance enhancing drugs. The nationwide raid calls attention to what officials say are the dangers of steroid use among pr
2007年VOA常速英语（十月）
1. The tearful family and friends of slain US Border Patrol Agent Nicolas Ivie attended funeral services for him today. Ivie's death is believed to be the result of friendly fire. A second surviving agent was also shot. 2. President Barack Obama's ca
美联社新闻一分钟2012(十月)
1. Republican presidential nominee Mitt Romney will give a major foreign policy speech Monday when he visits Virginia Military Institute. Romney is expected to say that it's time to change course in the Middle East. 2. Federal health officials say th
美联社新闻一分钟2012(十月)
New Study Could Change Treatment for Asthma Global treatment guidelines for asthma could change as a result of a study led by a researcher at the University of Texas Medical Branch. Most adults who have mild or moderate asthma are told to use their i
英语新闻