中心地

This paper starts with the Naroll-Bertalanffy's hypothesis of the allometric growth of urban-rural population, namely and Sherratt's model about the distribution of urban population density, which are both based on the Christaller-l o ··sch's central place hypothesis and the hypothesis of supposing the regional population movement on the ideal land surface is similar to Brownian movement process.

基于中心地假设，从城市人口分布的Sherratt模型和Naroll Bertalanffy的城乡人口异速生长关系出发导出关于人口分布空间动力学和城市扩展时空过程的数学模型，然后借助Batty等关于城市生长的DLA -DBM模拟结果证明人口的区位选择过程与城市的分形形态存在着内在关系。

It was never, however, the Buddhist way to proselytise-in the sense of forcing ideas and beliefs upon an unwilling audience, much less to exert pressure of any kind, or any knid of flattery, deceit or cajolery, to win adherence to one's own point of view.

佛教徒从不强迫任何不情愿改变自己信仰的人接受其思想或信仰，也不企图使用任何压力，任何阿谀奉承，欺诈哄骗的手段来获取自己观点的附庸，佛教布道师们从不在商业中心地以竞争的手段获取归依。

It was never, however, the Buddhist way to proselytise-in the sense of forcing ideas and beliefs upon an unwilling audience, much less to exert pressure of any kind, or any knid of flattery, deceit or cajolery, to win adherence to one's own point of view. Buddhist missionaries have never competed for converts in the marketplace.

佛教徒从不强迫任何不情愿改变自己信仰的人接受其思想或信仰，也不企图使用任何压力，任何阿谀奉承，欺诈哄骗的手段来获取自己观点的附庸，佛教布道师们从不在商业中心地以竞争的手段获取归依。

All but one of the deaths were in Mexico, the epicenter of the outbreak.

除一人外，其他死亡患者都在疾病爆发的中心地墨西哥。

Since then, Oklahoma has become the center of ground source heat pump research and development.

从那时起，俄克拉荷马州已成为发展的中心地源热泵研究与实践。

The results are listed as follows:(1) In peneplain with plenty water-resource, hexagonal spatial structure of urban system can be formed. Due to differential competed function of central places, the hexagonal system is distorted. The result is that the area covered is decr eased and the girth is unchanged——but every border is usually unequal;(2) A pattern of pentagonal system evolves from hexagonal system controlled by a river;(3) A pattern of quadrilateral develops from hexagonal system under two parallel rivers;(4) The equal distance distribution of central places in narrow geographic space has its special reasons. The results are very important for understanding urban's formation and development and urban plan in Huang-Huai-Hai plain.

本文通过自然地理因素中水文、地形这两个重要要素对城镇体系空间结构形成的影响，分析了华北平原区在不同要素影响下的城镇体系空间结构样式：①在水源充足的准"均质"河北冲积平原上，基本满足六边形形成条件，但由于周边中心地发展竞争力不同，故使得正六边形发生畸变——覆盖面积减小而周长却保持不变；②构建了在一条河流影响下的六边形网络结构朝五边形网络演变的模型；③构建了在平行状河流作用下六边形网络向四边形网络演替的模式；④指出了在水源充足的狭长地理空间，城镇体系空间结构发育成等间距的现象与原因。

The central front in the war on terror is not Iraq and it never was .

这场恐怖战争的中心地不是也不会是伊拉克。

Hack's law, which can be derived from the second and third Horton's models, is same to allometric relationships between area and population of urban systems, the latter is connected with Beckmann's models and thereby with central place theory.

然后证明基于中心地理论的Beckmann城镇等级—规模模型与 Horton水系构成第一、第二定律数理同构，关于城市人口—城区面积的异速生长关系模型与关于主河道长度—流域面积的几何测度关系模型以及 Horton水系构成的第二、第三定律数理同构

Psammoma bodies or calcospherites are 50–70 mm round-shaped calcic concretions. They have a glassy appearance, are concentrically laminated, and stain dark blue to black in Giemsa, brown to black in Papanicolau Figs.

砂砾体或钙化颗粒有50-70毫米子圆形钙化结结，他们有一个玻璃外观，是同中心地夹层，并吉姆萨染色呈深蓝色黑色的，巴氏染色呈棕黑色。

For compartmentalizing highway transport station system scientifically,by introducing central place theory,the layered planning method for highway transport station system based on fuzzy clustering analysis was presented.

为明确划分公路运输站场体系的层次，将中心地理论引入公路运输站场体系分析中，提出基于模糊聚类的公路运输站场分层规划方法。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。