单词 | zero population growth |
释义 | zero population growth(ˈzɪərəʊ ˌpɒpjʊˈleɪʃən ɡrəʊθ) noun ▶ USAGE The abbreviation for zero population growth is ZPG sociology the condition, viewed as a social aim, when the population of a given area neither increases nor declines When the birth rate and death rate are equal, we have zero population growth, orthe stable equilibrium phase. |
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