单词:methylmetal-crylates
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This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Saliva contains many useful components: lubricants, enzymes for breaking down food and now compounds that can reveal a persons age. Thats according to a
AGRICULTURE REPORT - Restrictions on Methyl Bromide By Mario Ritter Broadcast: Tuesday, March 16, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Graphic Image Some chemicals
By Noel King Khartoum 15 February 2007 Amid growing concern over continued violence in Sudan's Darfur region, top United Nations and African Union envoys to the region said Thursday they remain optimistic that a political solution to the crisis can b
By Michael Bowman Washington 25 March 2007 A former U.S. ambassador to the United Nations says only regime change will cause Iran to halt its nuclear program. VOA's Michael Bowman reports from Washington, Ambassador John Bolton spoke one day after th
Science and Technology Epigenetics and stress Baby blues 科技 外因遗传与压力 新生儿蓝调曲 A mother's stress while she is pregnant can have a long-lasting effect on her children's genes 母亲孕期压力过大会对孩子的基因造成长
By Michael Bowman White House 04 May 2006 President Bush says the United States remains committed to promoting justice and prosperity in Latin America, and is backing its words with actions and aid. M