title: A remark on life expectancy of population systems.
authors.forename: J
authors.initials: J
authors.lastname: Song
mesh_terms: D003710:Demography; D005069:Evaluation Studies as Topic; D008017:Life Expectancy; D015993:Life Tables; D008136:Longevity; D008962:Models, Theoretical; D009026:Mortality; D011153:Population; D011157:Population Dynamics; D012106:Research
keywords: Demographic Analysis; Demographic Factors; Evaluation; Evaluation Methodology; Length Of Life; Life Expectancy; Life Table Method; Life Tables; Models, Theoretical; Mortality; Population; Population Dynamics; Research Methodology