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3. | sex ratio at birth, SRB 【摘要】: 出生性别比(sex ratio at birth, SRB)指的是每100名女婴出生所对应的男婴数,它是一个人口周期开始时的结构标识,经 … cdmd.cnki.com.cn|基于6个网页 |
4. | Sex ratio at birth birth order... ... 生卒年: The years of birth and death 出生性别比: sex ratio at birth 生灭过程: birth and death process ... www.lw23.com|基于 1 个网页 |
5. | the Birth Sex Rate birth... ... 生死轮回: Eternal Cycle of Birth and Death 出生性别比: the Birth Sex Rate 歌剧的诞生: the birth of Opera ... www.lw23.com|基于 1 个网页 |
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