1.
population by age group
按年龄分组的人口数
2.
population by sex
按性别分组的人口数 按性别分组的人口数
3.
sex ratio by age groups
按年龄分组的性比例
4.
a statistic characterizing human populations (or segments of human populations broken down by age or sex or income etc.).
描写人口（或按照年龄、性别、收入分类的人口段）的统计量。
5.
population by educational level
按教育水平分组的人口数
6.
They divided themselves into three groups according to age.
他们按年龄分成三组。
7.
School-children are taught according to age groups.
学童是按年龄分组施教的。
8.
Intended age group of market, e.g., teenage, mature etc.
按市场年龄组划分,即：青少年的、成年的等。
9.
patients typed by age and blood group
按年龄和血型分类的病人.
10.
He broke down those income tax totals by age group.
按年龄分类,他给出了那些所得税总数的细目表。
11.
place(schoolchildren)in streams
将（学童） 按年龄和智力编班或分组
12.
"which offers a breakdown by sex, age, family size, income, and so forth."
"听众构成"方法则对听众按性别、年龄、家庭人口、收入等进行分类。
13.
Comparative Analysis of Population Structure by Age between Han and Tibetan Nationality;
汉族、藏族的人口年龄结构比较分析
14.
cumulative average gross fertility ratios by age groups
按年龄组统计的累积平均总生育率
15.
They were divided into three groups,the young aged group(40-44),middle aged group(45-59) and old aged group(≥60).
按年龄分为青年组(40-44岁)、中年组(45-59岁)及老年组(≥60岁)。
16.
Evaluation and Adjustment on Age Structure Data in Fifth Census;
对第五次人口普查年龄结构数据的评估与调整
17.
Analysis of normal eye anterior segments in different ages
不同年龄正常人群眼前节参数的分析
18.
A Composite Age-Specific Fertility Rate Model Based on Random Distribution Functions;
基于随机分布函数的分年龄别生育率组合模型