年龄: age分级: grade; classify; classificat ...年龄分布: age composition; age distribution; age structure年龄分层: age stratification年龄分类: age category; character classification by age年龄分配: age distribution年龄分数: age score年龄分组: age cohorts; age-cohorts; agespecific同年龄分布: uniform age distribution年龄分布，树龄分布: age distribution初始年龄分布: initial age distribution人口年龄分布: population age distribution稳定年龄分布: stable age distribution按年龄分组比赛: age group competition; age-group competition按年龄分组儿童: children by age group按年龄分组训练: age group training按年龄分组游泳: age-group swimming不平衡年龄分布: disequilibrium age distribution获得性年龄分布: attained age distribution年龄分布不平衡: age distribution disequilibria年龄分布状况分析: age pattern analysis人口年龄分析季报: quarterly estate population age analysis按年龄分组的人口数: population by age group按年龄分组的性比例: sex ratio by age groups按年龄分组进行比赛: age-groucompetition
