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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
Scientific American(六)月
Ever get a sour stomach after your morning coffee? Well, you might end up switching to a dark roastbecause that coffee concoction may leave you with a happier tummy. That's according to the research presented at the American Chemical Society meeting
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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
农业与发展
Ramadan Lanterns Brighten Egyptians' Holy Month In the weeks leading up to Ramadan, vendors like Ahmed Abu Kamel start popping up in the markets and streets of Cairo selling fanous - or fawanees as they are called in the plural. Workers start manufac
VOA标准英语2012年(七月)
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
经济学人科技系列
大家都知道on the run的意思是“（为逃避警察追捕而）逃跑、躲藏”，可你知道吗，英语中还有一个俚语on the lam，也可以表示此意。 Lam起源于挪威词lamja，
英文语法词汇