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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(64) / 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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农业与发展

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Students Aim for Aviation History with Human-Powered Helicopter Within reach What seemed impossible when William Staruk began his PhD studies at the University of Maryland three years ago, is now within reach. He's part of a 50-member team developing

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上周，韦氏官方正式宣布收录了1000多个网络词汇！看来韦氏词典追又赶了把时代潮流，企图站在年轻酷炫的风尖浪口。现在韦氏词典也被带跑偏了。2017年加入的这批热词里，于是我们看见了

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学英语单词

3-methoxynorepinephrine

actinograph

aladdins

algebraic vector bundle

amphophil cell

anion anion exchanger