生物学的

蒋健棠听说学英语 Chapter16:The wildlife biologist

发表于:2018-12-26 / 阅读(87) / 评论(0) 分类 蒋健棠听说学英语

85 新功效的抗生素在加州诞生 DATE=8-15-01 TITLE=SCIENCE REPORT - Designer Antibiotics BYLINE=Jerilyn Watson (Start at 1'04

发表于:2019-01-02 / 阅读(105) / 评论(0) 分类 科技之光

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

发表于:2019-01-02 / 阅读(73) / 评论(0) 分类 VOA2003(下)-农业与经济

Doctors warn intentional infection not a good idea Alex Villarreal | Washington, DC 17 December 2009 CDC says the best step to protection is vaccination Many Americans are doing all they can to avoid the H1N1 virus. But talk in the news and on the In

发表于:2019-01-13 / 阅读(43) / 评论(0) 分类 VOA标准英语2009年(十二月)

By Lisa Schlein Geneva 20 August 2007 Experts attending an international conference are calling for quick action to reduce the threat posed by biological weapons. Participants attending the week-long meeting at the United Nations in Geneva say the so

发表于:2019-01-31 / 阅读(57) / 评论(0) 分类 2007年VOA标准英语(八月)

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

发表于:2019-02-06 / 阅读(81) / 评论(0) 分类 阅读空间