vital index

名词 n.
中文释义

英文释义

名词 n.
  1. The ratio of the number of births to the number of deaths in a population over a specific period of time.
    — Now what is the real biological meaning of the vital index? What does it actually measure? It measures always the present worth of the evolutionary survival value of a population, but implies nothing as to how this present worth is brought about. Furthermore, the vital index implies nothing intrinsic in a population.

词形变化

vital indexes plural

词源

From vital + index
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