“stable age distribution”的概念、定义、翻译、参考文献-科学参考

单词	stable age distribution
释义	stable age distribution Encyclopedia 理学稳定年龄分布释 stable age distribution稳定年龄分布如果出生率和死亡率保持不变，则种群各年龄级个体的相对比例不随时间而变化的年龄分布。
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