单词:biogenetical
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Boadcast: February 18, 2003 By Mario Ritter This is the VOA Special English Agriculture Report. Food in the United States can include genetically engineered crops. No genetically engineered animals, h
Broadcast: Jan 28, 2003 By Mario Ritter This is the VOA Special English Agriculture Report. A number of companies are expected to seek approval from the United States Food and Drug Administration to p
蒋健棠听说学英语 Chapter16:The wildlife biologist
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By Mario Ritter Broadcast: October 28, 2003 This is Steve Ember with the VOA Special English Agriculture Report. Farmers have long put animal waste on their fields. They may also use human waste. Mode
俄罗斯莫斯科的一位生物能量学教授近日宣布,他已研制出一种能够有效延缓衰老的不老药,并有望于几年内上架销售。这位科学家用40年的时间研制出一种抗氧化剂,能够有效抑制氧分子对人