等人口達到穩態，保持終身生育率為2，就能保持人口規模。人活得長了，性成熟也會晚，生育自然也會隨之變晚。

來源: 半坰於 2024-05-21 16:06:54 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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