单词：factorial primes
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Pregnancy brings big physical changes to a woman's body. But what three neuroscientists were more interested in was, what does it do to the womans brain? We were in our 30s, and we were thinking I'd like to have a baby, but look at this, look at this
发表于:2018-12-02 / 阅读(192) / 评论(0)
2016年Scientific American(十二)月
2016年Scientific American(十二)月
SCOTT SIMON, HOST: There are lots of lists as the year draws to a close: best films, best books, Persons of the Year. This year, NPR is looking at the numbers that tell this year's story. So, our math guy, Keith Devlin, has a nomination for number of
发表于:2019-02-23 / 阅读(180) / 评论(0)
英语语言学习
英语语言学习