单词：4-methylumbelliferone
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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
Scientific American(三)月
电影词典 Apocalypse Now 现代启示录 AMERICAN SLANG 美国俚语 剧中：You were never a lifer. a lifer ： 做..... 很长的一段时间 e.g. 1My dream job is to be a lifer on a famous television show. 2The guilty criminal got a lifer,he w
听动感英语学口语
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
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
1) The Silent Sharer 只转不评者 2) The Commenter 评论者 3)The Popular One 红人 4) The Copycat 抄袭者 5) The Creative One 原创者 6) The Badge Master 勋章达人 7) The Stalker 围观者 8) The No-Lifer 抢沙发者
英文语法词汇