sex ratio at birth
短语词组
- managing sex ratio at birth 出生性別比治理
- High Sex Ratio at Birth 出生性別比偏高
- Sex Ratio at Birth Time 時點出生性別比
- the sex ratio at birth 出生性別比
- statistical sex ratio at birth 出生統計性別比
- sex ratio unbalance at birth 出生性別比失調 返回 sex ratio at birth