birth rate
短语词组
- 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 出生率作爲特定出生率 返回 birth rate