标签：多胞胎 相关文章
Most of the time, mothers work hard all year round and are rewarded for it with only a single day of relaxation. With the celebration of Mother's Day in May, National Geographic Channel is showing one of its all-time favorites, In the Womb. This mont
发表于:2018-11-30 / 阅读(210) / 评论(0)
常春藤生活英语
常春藤生活英语
Identicals share one of the closest human relationships biologically. They are likely to grow up looking and sounding extremely similar, yet not a 100% match. A small number of genes in the mother's eggs sit outside the nucleus, known as mitochondria
发表于:2018-12-05 / 阅读(62) / 评论(0)
国家地理2007年
国家地理2007年
Multiple births 多胞胎 Oh, baby 噢，宝贝 A reduction in multiple-birth pregnancies is a good thing 多胞胎怀孕率的减少是件好事 IT HAS long been known that in-vitro fertilisation (IVF) increases the chances of multiple births, as se
发表于:2019-02-24 / 阅读(68) / 评论(0)
经济学人文艺系列
经济学人文艺系列