替换率——用来协调静止人口的总出生率级别。
Replacement rate — The level of total fertility that is compatible with a stationary population.
从对热点人口的分析来看，非洲板块似乎是静止的，在过去的3000万年里它没有移动过。
From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
从对热点人口的分析来看，非洲板块似乎是静止的，在过去的3000万年里它没有移动过。
From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
从对热点人口的分析来看，非洲板块似乎是静止的，在过去的3000万年里它没有移动过。
From an analysis of the hot-spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
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