男女有別

男女有别
nánnǚyǒubié

there are differences between men and women; men and women are inherently different

Wiktionary

Entry Composition

1 男女 nánnǚ
  1. male-female
  2. male and female
2 有別 yǒubié
  1. different
  2. distinct
  3. unequal
  4. variable