“prenatal mortality rate”的概念、定义、翻译、参考文献-科学参考

单词	prenatal mortality rate
释义	prenatal mortality rate Encyclopedia 医学人口统计指标释 prenatal mortality rate围生儿死亡率围生期的胎儿和新生儿死亡数（死胎、死产）占死亡数与活产数之和的比。
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