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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

发表于:2018-12-24 / 阅读(60) / 评论(0)

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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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医务英语

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农业与发展

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a cap

acidic materials

acrylonitrile-styrene copolymer

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ammoniating solution

anterior scalene muscle

axis-of-evil

befitting

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Butler finish

byrdie