population L有长不应期的人群populationn.人口；(全体)居民；群体population dynamicsl种群动态population subgroups人口各群体population situation人口状况,人口状态population deviation总体偏差population variation人口变量Population abundance种群动态population gradation种群阶梯population attribute群落特征population mortality种群死亡population expansion人口膨胀