查询词典 decrease in population

Three types of keratinocytes were studied: the SP, the main population, and the unsorted initial population.

本研究中研究了三群细胞：侧群细胞、主群细胞、以及未分选的细胞群。

Objective To understand the current situation of KAP of verminosis prevention among floating population,and guarrantee the population's health.

目的了解流动人口对寄生虫病预防的知、信、行现况，以便进行有效预防和控制寄生虫病，保障广大人民群众的身体健康。

Because the floating population were lack of knowledge of Verminosis prevention and with high risk behaviours.It needs to strengthen health education and behavior intervention on floating population.

结论流动人口普遍存在寄生虫病知识缺乏与高危险行为，应加强对流动人口的宣传教育和行为干预。

Distribution,ecological types and population abundance of the wild yark in China are discussed according to field investigation and literature review in this paper.the amount of wild yark population size is estimated about 20000-40000 heads.

野牦牛仅分布于青藏高原4500米以上的高山寒漠，数量约2—4万头。野牦牛和家牦牛属于同种动物，论述了野牦牛的两个生态类型，祁连山型和昆仑山型。

Seventhly, we sets up the reaction-diffusion equations about population-resource relationships; Further more, we analyzes these typical conceptual models making use of differential equation theory. The conclusion shows that human with natural environment co-exist conditions when human-environment is conflicting, mutual, predacious, harmonious. The relation both human and environment has to harmonious each other for the population-resource benefit maximum.

在连续时间条件的假设下给出了关于人口与农业生态资源的具有代表性的几种反应扩散方程形式；根据微分方程定性理论，对所建立的几种模型进行分析研究，得出当人类与生态环境处于冲突、互助、掠夺与和谐状态时，双方能长久共存的稳定条件，并得出只有在人口与资源和谐共处的情况下，才能使环境承载力及人类总数达到最大化的结论。

The population density is nevertheless approximately three-fold compared with the average population density in China.

而且居民密度从来没有超过中国平均人口密度的三分之一。

The first fifty years of the next millennium will be critical for the world's population. By 2050 population growth should have leveled off, but by then we 'll have 10 billion people--two-thirds as many again as we have to day.

新千年的前50年对世界人口来说是至关重要的，到2050年，世界人口将趋于平稳，但到那时，世界人口将达到100亿，比现在多2／3。

The first fifty years of the next millennium will be critical for the world's population. By 2050 population growth should have leveled off, but by then we'll have 10 billion people--two-thirds as many again as we have today.

新千年的前50年对世界人口来说是至关重要的，到2050年，世界人口将趋于平稳，但到那时，世界人口将达到100亿，比现在多2／3。

The first fifty years of the next millennium will be critical for the world's population. By 2050 population growth should have leveled off, but by then we'll have 10 billion people--two-thirds as many again as we have today.

世界人口新千年的前50年对世界人口来说是至关重要的，到2050年，世界人口将趋于平稳，但到那时，世界人口将达到100亿，比现在多2／3。

Transgenic Bt cottons increased the population of ammonifying bacteria and decreased that of inorganic phosphorus-solubilizing bacteria significantly at seedling and flowering stages, whereas they increased the population of aerobic cellulose-decomposing bacteria and decreased that of organic phosphorus-solubilizing bacteria significantly only at the flowering stage.

苗期和花期转Bt基因棉均可显著提高氨化细菌、显著降低无机溶磷菌数量，花期均可显著提高好气纤维分解菌、显著降低有机溶磷菌数量，'Bt冀668'苗期也可显著提高好气纤维分解菌数量。

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。