population L有长不应期的人群populationn.人口；(全体)居民；群体population of levels能级数population diversity种群多样性population character早熟population institute人口学会population explosionn.人口爆炸；人口激增population education人口教育Population improving群体改良population gathering人口聚集population importing人口导入population semigroup人口半群