[网络] 氨基甲酸甲酯

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)

Scientific American(六)月

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)

Scientific American(三)月

AGRICULTURE REPORT - Restrictions on Methyl Bromide

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

发表于:2019-01-06 / 阅读(87) / 评论(0)

农业与发展

VOA标准英语 Indian PM to Discuss Taliban with Obama

Indian Prime Minister Manmohan Singh is expected to tell President Barack Obama there is no difference between good and bad Taliban when they meet this week on the G20 sidelines. Indian Prime Minister Manmohan Singh (file) India's prime minister wil

发表于:2019-01-13 / 阅读(52) / 评论(0)

VOA标准英语2009年(四月)

【英文短篇小说】Confido

Kurt Vonnegut The Summer had died peacefully in its sleep, and Autumn, as soft-spoken executrix, was locking life up safely until Spring came to claim it. At one with this sad, sweet allegory outside the kitchen window of her small home was Ellen Bow

发表于:2019-01-23 / 阅读(108) / 评论(0)

英文短篇小说

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

发表于:2019-01-26 / 阅读(58) / 评论(0)

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border ring(reaction)

brake lever sector

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