查询词典 decrease in population

The natural population growth rate of 0.42% and a population density of 171 persons per square kilometer.

人口自然增长率为0.42%，人口密度为每平方公里171人。

China is the world's population density is one of the countries with high per square kilometer, the average population density of 134 people; but rather a balanced distribution.

中国也是世界上人口密度较高的国家之一，每平方公里的平均人口密度为134人；但分布颇不均衡。

Area of 12 square kilometers, household residents in 8334, population 27,686, and the population density 2037 people per square kilometer.

面积12平方公里，户籍居民8334户、人口27686人，人口密度平均每平方公里2037人。

In May 2008 demographers in the United States announced that the estimated global urban population had exceeded the estimated global rural population for the first time.

2008年5月在美国人口统计学家宣布，估计全球城市人口超过了预计的全球首次农村人口。

Second, Shenzhen, population growth and more rapid population growth accounted for a total purchase of around 60%.

第二，深圳，人口增长和更迅速的人口增长占了总购买60 ％左右。

It is suggested that the historical factors,including severe bottleneck and subsequent genetic drift during Quatemary glaciations and fragmentation in postglaciation,small population sizeandlow seedling establishment would have contributed to such a population genetic structure in A.yunrumensis.Based on these results,strategies are proposed for the genetic conservation and management of A.yunnanensis

建议对所研究的云南穗花杉全部居群予以保护，特别是对云南西畴和贵州兴义市七舍两个具有相对较高遗传多样性的居群应该优先建立就地保护点，以达到最大限度保存云南穗花杉遗传多样性的目的。

The speeding up of the process of urbanization implies that there will be a lot of agricultural population changing into urban population. One necessary requirement is to provide a path to enter the social security system for those who are mainly engaged in non-agricultural industries but live in rural areas. However, due to the non-agricultural populations not participating in the social insurance system, it is hard for them to accumulate the insurance fund. Because of the dual urban and rural social security system, it is difficult for the social insurance to link up.

城市化进程的加快，意味着将有大量的农业人口转化为城市人口，其中的一个必要条件就是为非农化人口(主要从事着非农产业但户口在农村的人口)提供进入城市的社会保障制度通道，但由于有可能转变为市民的非农化人口在农村时没有参加社会保险，使其在城市参加社会保险时保险基金的累积和交费期受到一定制约；由于城乡的二元社会保障制度，使得由于人口流动所产生的社会保险的衔接出现困难。

In a no overlapping generation population with selection, mutation、migration and random drift under consideration, two mathematical models presented in this paper might describe change of frequencies of multiple alleles at a locus and population mean of metrical characters resp.

在假定无世代重叠，群体内存在选择、突变、迁移，且考虑漂变效应的情况下，本文所构建的两个数学模型可分别用来描述一个座位上多个主基因频率或数量性状群体均数的动态变化。

As PTDT does in threshold traits, PTDT is valid not only for different QTL effect level, but also for maker with multiple alleles and multiple tightly linked markers.(2) Under an appropriate selection ratio s (in this study, s is 0.2, 0.4, 0.6, 0.8, respectively), the power of PTDT can be improved and the genotying individuals can be decreased using selective genotyping design. However, the power of PTDT is related with population size and population structure, an appropriate selection ratio can be defined by simulation based on the existing data.(3) Among the three transforming methods, mixed-family selection is the best, full-sib selection has same power to mixed-family selection in many parameter combinations, and Estimated Breeding Value selection is inferior to them.

数量性状QTL定位的模拟研究结果表明：(1)数量性状经有效转化后，PTDT对数量性状QTL定位保持了阈性状QTL定位的稳健与高效，对不同效应大小的QTL(10％，30％，50％)PTDT都是一个有效的分析方法；(2)在多等位基因标记、多标记方面，PTDT的检验功效与阐性状分析时一样高效；(3)在合适的选择率下(本研究的分别为0.2，0.4，0.6，0.8，1.0)，选择性基因型测定不仅可以减少基因型测定的数量，而且可以提高PTDT的检验功效，但选择性基因型测定的PTDT检验功效很大程度上与群体大小和结构有关，这个可根据具体情况通过模拟找到一个合适的选择率；(4)三种转化方法的转化效力结果表明，家系内混合家系选择的转化效力最高，家系内全同胞选择次之，估计育种值选择的转化效力较差。

As the density of city population, industrial structure and economic development levels are all apt to change constantly, there will be readjustments of the most optimum city population size.

由于城市人口密度、产业结构和经济发展水平是不断变化的，最优的城市人口规模也会在不同时期有所调整。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。