(1973). The age-composition of populations of Calathus melanocephalus L. analysed by studying marked individuals kept within fenced sites. Oecologia 12: 213–240.Dijk, Th. S., Van 1973. The Age-Composition of Populations of Calathus malanocephalus L. Analysed by studying marked individuals kept...
沪江词库精选population composition by age是什么意思、英语单词推荐 人口年龄构成 相似短语 population composition by age 人口年龄构成 composition of population 人口构成,人口组成 population composition 人口构成,人口组成 population composition by sex 人口性别构成 mosquito age composition 蚊龄组成 charge...
age composition of a population, not economic dependency. Some children and elderly people are part of the labor force, and many working-age people are not. Age structure in the World Bank's population estimates is based on the age structure in United Nations Population Division's World ...
必应词典为您提供age-composition的释义,un. 〔社〕年龄构成; 网络释义: 年龄结构;年龄组成;城市人口年龄结构;
Development Relevance:Patterns of development in a country are partly determined by the age composition of its population. Different age groups have different impacts on both the environment and on infrastructure needs. Therefore the age structure of a population is useful for analyzing resource use an...
Population dynamics is a field of ecology that focuses on the size, composition, and distribution of populations and how these factors change over time. The composition of a population includes variables such as its age structure, sex ratio, and phenotyp...
Rejuvenation of the pollen composition by infiltration could continue until the start of peat accumulation around 3800 BC. Likely, the lowering of the temperature in the Subboreal and subsequently the decrease of evapotranspiration by forest was responsible for soil wetting at that time. The ...
The chart below gives information about the growth of the urban population in certain parts of the world, including predictions for the future. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words. Task 1 柱状图 - ...
6) age structure of population 人口年龄结构 例句>> 补充资料:城市人口年龄构成 age composition 一定时间城市人口按年龄的自然顺序排列的数列所反映的年龄状况,以年龄的基本特征划分的各年龄组人数占总人口的比例表示。 说明:补充资料仅用于学习参考,请勿用于其它任何用途。
摘要: The age and sex composition of the populations of the countries of the world is calculated from the 1978 U.N. projections and presented here. Some comments on the population trends observed are also presented. (summary in ENG) (ANNOTATION)...