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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

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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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学英语单词

AABB

administrative country

agromyza panici

alternate standard

anal triangle of perineum

angular momentum density

anti-agers

awi-

Ban Hin Hao

be all fingers and thumbs

be party to