male female ratio

• 男女比例

male female ratio的用法和样例：

例句

1. One of the most underappreciated forces affecting life in the U.S. is the sex ratio.
   男女比例对美国人的生活深具影响，但几乎不受重视。
2. Second, a disproportional rate of male and female students in one class is conducive to class discipline and learning effect.
   其次，男女比例不一致有利于班级纪律和学习成效。