单词:aminoothyl mercaptan
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PEOPLE IN AMERICA - February 24, 2002: Barbara Cooney By Avi Arditti ANNCR: Now, the VOA Special English program, PEOPLE IN AMERICA. Today, Shirley Griffith and Steve Ember tell about the life of Barb
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You know,it's pure luck. Ever heard of a bullet-proof BlackBerry? The smartphone is usually used to make a phone call,check e-mail or do some social networking. But this BlackBerry Curve, literally stopped the bullet. I checked,there's no ad for that
This is the VOA Special English Health Report. Autumn and winter are cold and flu season -- when people are most likely to catch the viruses that cause influenza and the common cold. Is the old advice true that dressing warmly will help prevent a co
Car accidents are the number one killer of teenagers in the United States. Government data show that every year over 4,000 teens lose their lives in collisions that are caused mostly by distracted drivng - a term that includes everything from having
67 维生素C能否破坏DNA? DATE=7-11-01 TITLE=SCIENCE REPORT - Vitamin C and DNA BYLINE=Nancy Steinbach (Start at 59