短語(yǔ)詞組短語(yǔ)low birth -rate 低生育水平a declining birth -rate 逐漸下降的出生率Asia Experiences Huge Birth -Rate Decli 下一篇birth order -specific fertility rate 出生胎次別生育率still -birth rate 死産率age -marital duration-specific birth rate 分年齡婚齡出生率spe -cific birth rate 出生率作爲(wèi)特定出生率 返回 birth rate