盐酸去氧麻黄碱

SSS 2011-06-22

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

发表于:2018-12-24 / 阅读(63) / 评论(0)

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SSS 2010-03-23

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

发表于:2018-12-24 / 阅读(66) / 评论(0)

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AGRICULTURE REPORT - Restrictions on Methyl Bromide

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农业与发展

Study: Loss of Ozone Slows

By Caty Weaver Broadcast: September 12, 2003 This is Bob Doughty with the VOA Special English Environment Report. Scientists in the United States have reported some good news about the 1)ozone in the

发表于:2019-01-11 / 阅读(67) / 评论(0)

VOA2003（下）-环境与健康

经济学人69:外因遗传与压力新生儿蓝调曲

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

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经济学人科技系列

音乐咖啡厅:Dream you to life-Jordyn Taylor

英文歌词： To life to life to life Mmmm Its 3 am 3 am Im half asleep I start to feel Start to feel you next to me Lying here in the dark Somethin dont feel that right Cos its too many times a broken heart Too many times Thats too many times Ive had

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