The normal human birthratio is 106 males for every 100 females.
正常的人类出生比例是每106个男性对应100个女性。
2
The high male to female birthratio has become the most outstanding issue in China's population structure.
出生性别比畸高成为当前中国人口结构中最突出的问题之一。
3
But since 1970, the U. s. and Japan have experienced a downward shift in this male-to-female birthratio, researchers report in the online edition of the journal Environmental Health Perspectives.