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- Change of age structure of population and its relationship to development of health business in Henan province 河南省人口年龄结构变化与卫生事业发展
- Age structure of population 人口年龄结构
- Judging method of individual age and age structure of Stellera chamaejasme population in degraded steppe. 退化草原狼毒个体年龄判定方法及其种群年龄结构的研究。
- Based on the theory of demology, the types of population age structure are divided according to the different proportions of elderly population and young population. 按人口学理论,人口年龄结构的类型是依据老年人口或未成年人口在人口中的不同比例来划分的。人口年龄结构类型分为年轻型、成年型和老年型。
- The prealence and burden of COPD are projected to increase in the coming decades due to continued exposure to COPD risk factors and the changing age structure of the world's population. 在未来十年,随着COPD的危险因素的持续增多和世界人口年龄结构的变化,COPD的患病率和由其造成的负担将显著增加。
- Population aging refers to the course of social development in which the proportion of the elderly population continuously rises in the general population and as well as the aging of population age structure. 所谓人口老龄化,是指在一个国家或地区因人均预期寿命的不断延长而使老年人口在总人口中的比重上升和人口年龄构成老化的社会发展过程。
- There are also problems in the quality and structure of population that should not be neglected. 在人口素质、人口结构方面也存在一些不可忽视的问题。
- And the probability of crossing and aberrance would be dynamically changed with the structure of population. 遗传运算参数中的交叉和变异概率随种群结构特征动态变化。
- Effects of different spacing form, density on structure of population、light distribution and yield of phaseolus vulgaris were studied under the high yielding condition. 摘要研究了在高产条件下,不同行距配置、密度对奶花芸豆群体冠层结构、光能分布与利用特性及产量构成的影响。
- Tree-ring chronologies and the age structure of a Schrenk spruce (Picea schrenkiana) forest were developed to examine treeline dynamics in recent decades in relation to climatic variability. 在干旱或半干旱地区,温度是限制树木生长的重要气候因子。生长季开始时最低温度的升高有利于延长生长季,与年轮宽度正相关;
- China Cartographic Publishing House has a reasonable age structure, the knowledge structure of mutual penetration of the compound publishing, managing and operating-type personnel. 中国地图出版社拥有一支年龄结构合理、知识结构相互渗透的复合型出版、管理和经营型人才队伍。
- The density of population in this city is very high. 这个城市的人口密度非常高。
- The microscopic structure of tissue. 组织机构组织的微观结构
- We know a lot about the structure of genes now. 如今我们对基因的结构有了较多的了解。
- The structure of the sentence is strange. 这个句子的结构很奇怪。
- STUDY ON AGE STRUCTURE OF RATTUS NORVEGICUS POPULATION 褐家鼠种群年龄的研究
- Demography is the analysis of population variables. 人口学是对人口变量的分析。
- Moderate population scale and density, excellent quality and reasonable structure of population will promote a fully coordination between population and economy, society, resource, environment. 适度的人口规模、适宜的人口密度、优良的人口素质和合理的人口结构将促进人口与经济、社会、资源、环境的全面协调。
- Not much information is available about the structure of populations of earthworms. 关于蚯蚓种群结构方面有价值的报道不多。
- We now come to the question of population. 现在我们开始谈人口问题。