短語詞組短語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(diǎn)出生性別比the sex ratio at birth 出生性別比statistical sex ratio at birth 出生統(tǒng)計性別比sex ratio unbalance at birth 出生性別比失調(diào) 返回 sex ratio at birth