查询词典 decrease in population

The urbanization is a process of quantitative and qualitative changes of population, industries and agents of production, a procedure of population, economy, environment and resources' development coordinately.

城镇化是人口、产业和生产要素向城镇聚集的量变和质变过程，以及在此基础的人口、经济、环境、资源的协调发展过程。

Meihua still suffers from deep social problems, including population drain, population aging, and alcoholism. In Wu Afu's corrugated iron home, alcohol used to be his only escape.

梅花部落还陷入深入的社会问题，有人口凋零，人口老化和喝酒文化问题，住在铁皮屋的吴阿福，酗酒成了他逃避生活的方式。

By using the Neighbor-joining method, a dendrogram was obtained based on genetic distances. The bootstrap values were evaluated for each crunode of the dendrogram by means of bootstrap test. The results showed that the mean heterozygosity of the whole native egg-typing duck breeds population was lower than those of native chicken breeds and goose breeds, suggesting that the genetic diversity in those duck breeds population is relativly rare and should be strengthened. The rank of the heterozygosity was consistent with that of the polymorphism information content. The results of the genetic distances between them indicated that the differentiation occurred long time ago. In the dendrogram, Weishan pocked, Youxian pocked, Huainan pocked, Guangxi pocked and Jingjiang pocked were classified into one goup, Chaohuand Enshi pocked were the second group, Liancheng white, Putian black, Jinding, Shanma, Sansui and Shaoxing were the flnra grong.

结果表明：我国所有蛋鸭品种全部群体的平均杂合度较低，其遗传多样性相对贫乏，各保种场要加强多样性的保护；各品种的平均多态信息含量的高低与群体平均杂合度的顺序完全一致；遗传距离的计算说明了13个品种的遗传距离较远，分化时间较长；13个地方蛋鸭品种被聚类为3个类，微山麻鸭、攸县麻鸭、淮南麻鸭、广西小麻鸭、荆江麻鸭聚为一类；巢湖鸭和恩施麻鸭聚为一类；福建省的鸭种连城白鸭、莆田黑鸭、金定鸭、山麻鸭与三穗鸭、绍兴鸭聚为一类。

According to the data of the analyses,revealed the population of Cryptomeria fortunei exhibited clump distribution pattern,single-dominant community type,sporadic type population structure and is able to natural regenerate...

柳杉种群呈典型的集群分布，并随个体的增大，由集群分布向随机分布发展的趋势，为间歇型的种群结构。通过对天目山柳杉的起源及其更新类型的探讨表明：天目山柳杉林属天然林与人工林共存状态，并可通过幼苗库进行天然更新，但具有机会性和波动性，需林窗和林内倒木等条件。图3表2参25

Based on the analysis of the characteristics of natural resources and population in this region, this article analyzed the interact results between population and resources, and pointed out a series of measures and suggestions on how to improving the currant relationships.

本文在分析西部地区自然资源条件和人口状况的基础上，研究了西部地区人口与自然资源相互作用的形式和后果，并提出了一系列改善西部地区人口与环境关系的对策和建议。

Synthesizing the pattern on the level of genet and clone population, Cycas fairylakea population tends to be contagious.

综合分析基株种群和无性系种群的分布格局，可以判断仙湖苏铁种群分布格局趋向于聚集分布。

Investigating the ecology environment and present situation of the endemic Cycas plants to Yunnan, especially the population structure and dynamics of C. Hongheensins and C. tanqingii. The results show that C. hongheensis is a critically endangered species because the number its individuals had decreased by 47% from 1992 to 2002 and no flowering and fruiting tree has found. While the population of C. tanqingii in Xiaoheijiang River is in a status of restoration because there are more young individuals and its age structure takes on the relatively stable shape of pyramid.

对云南苏铁属特有植物的生态环境、现状等进行了较为全面的调查，特别是对红河苏铁、潭清苏铁的种群结构和动态进行较为详细的调查，结果表明红河苏铁是一个极度濒危的种，2002年的个体数量比1992年减少了47%，连续3年的调查未发现具繁殖能力的个体；而潭清苏铁种群的年龄结构基本呈金字塔形，属较稳定的结构，且处于恢复期，繁殖更新基本正常。

The result is that the population is growing, but the proportion of the high-quality population is decreasing.

造成的结果就是虽然人口数量在增长，而高素质人口的比例却在下降。

Carl Haub is a demographer with the P.R.B."The population data sheet is an annual demographic survey, in which we gather demographic population statistics from all countries over the world."

Carl Haub 是人口参考局的一位人口统计学家，他说：人口数据表就是一项年度人口调查，在这项调查中我们搜集了世界上所有国家的人口统计表。

Combined with individual characters of special-area population,it is a great mission for Demology to apply the method of population estimate-indirectly creatively.

创造特殊区域的人口预测原理和方法是人口学工作者义不容辞的责任。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。