1.
sex ratio by age groups
按年龄分组的性比例
2.
population by age group
按年龄分组的人口数
3.
They divided themselves into three groups according to age.
他们按年龄分成三组。
4.
School-children are taught according to age groups.
学童是按年龄分组施教的。
5.
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。
6.
according to the age and sex of the captive.
这要按象的年龄性别来区分。
7.
place(schoolchildren)in streams
将（学童） 按年龄和智力编班或分组
8.
Most private pension plans provide benefits to retirees in proportion to a formula based on the employee's age, years of service and annual salary.
大多数退休金计划根据雇员的年龄、工龄和年薪按一定比例为退休人员提供福利待遇。
9.
Thinking the Therapy of Age-related Macular Degeneration;
年龄相关性黄斑变性治疗的比较分析
10.
Scale up the annual output of steel
按比例提高钢的年产量
11.
cumulative average gross fertility ratios by age groups
按年龄组统计的累积平均总生育率
12.
The chemical proportion of the human body will change as the age advances.
人体内化学成分的比例，会随著年龄而有所增减。
13.
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)。
14.
the division of children into groups according to age
根据孩子们的年龄分组
15.
Ageing Properties of Proportional Hazard Rate Model and Reversed Hazard Frailty Model and Stochastic Order Comparison
比例失效率模型的年龄性质及反失效率加型脆弱模型的年龄性质和随机序比较
16.
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
17.
gains from proportionate stratified sampling
按比例分层抽样的得益
18.
pro rata liability clause
按比例分摊责任的条款