1.
the division of children into groups according to age
根据孩子们的年龄分组
2.
population by age group
按年龄分组的人口数
3.
sex ratio by age groups
按年龄分组的性比例
4.
School-children are taught according to age groups.
学童是按年龄分组施教的。
5.
They divided themselves into three groups according to age.
他们按年龄分成三组。
6.
Kids from parturition to 180 days of age were divided into ten age groups, each consisted of three male and three female kids.
采用初生至180日龄的羔羊,分十个年龄组.
7.
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)。
8.
place(schoolchildren)in streams
将（学童） 按年龄和智力编班或分组
9.
Pathological Analysis of 280 Cases with Dfferent Age-Groy IgA Nephropathy
280例IgA肾病患者不同年龄组病理分析
10.
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。
11.
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
12.
During the festival, unmarried girls joined a foot race in three age groups.
活动期间，未婚的女孩分成3个年龄组参加赛跑。
13.
Determination and Analysis on the Content of Pb in People?s Hair of 3 Age Groups in Hanzhong City, Shanxi Province
汉中市三组年龄段人群发Pb含量测定分析
14.
Discussion of Juvenile Athletic Competition Grouped in Bone-Age
青少年运动员采用骨龄分组竞赛的探讨
15.
The Analysis of Risk Factors of Cerebral Ischemic Stroke in Different Age Adults;
不同年龄组缺血性卒中患者危险因素分析
16.
Analysis on Training Awareness of Swimmer at Age Group in Guangxi;
广西年龄组游泳运动员训练心理调查分析
17.
Histological Structures and Numerical Analysis on Pulmonary Artery of Yak at Different Ages
不同年龄牦牛肺内肺动脉组织结构及数值分析
18.
Clinical characteristics of mycoplasma pneumoniae pneumonia in children in different ages
儿童不同年龄组肺炎支原体肺炎临床特点分析