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Its always nice to know that the majority of the population has the attention span of a gnat.

它总是很高兴知道，大多数人有一个蚊蚋注意力。

When you write for a blog, your audience consists of internet users who have the attention span of a gnat.

当你写博客时，你的读者是网络用户组成的，他们的注意力范围就像一个小昆虫。

Most people think of marijuana users as dreamers with the attention span of a gnat and no memory worth the name.

大多数人认为服用大麻的人是注意力极度涣散的梦游者，根本无记忆可言。

This Gnat would be 48 inches long, a scale wing span of 37.75 inches.

这gnat将48英寸长，规模翼展三十七点七五英寸。

The first part is preface, on the basis of expounding the background, the purpose, the meaning and the thinking of the thesis study, briefly introduce the research achievements of domestic and international urban spatial structure; the second part is summary, expatiate on the connotation, component, research span and space type of urban spatial structure; The third part is theory foundation, mainly introduce the three classical models of city spatial structure in the west country (concentric circles mode, fan-shaped mode and multi-core mode) and the relative city development theories (growth pole theory, dot-axis theory, core-fringe theory, metropolis circle theory and city space evolution theory); The fourth part is general situations of study region; The fifth part is the analysis of Lanzhou city spatial structure evolution, along the historical venation Of city development, on the basis of analyzing industrial structure change, focus on and sumup the characteristics of spatial development and form, meanwhile, analyze factors which influences the spatial development; The sixth part is the analysis of Lanzhou city spatial development trend, put forward the development models of Lanzhou city spatial structure from three space aspects(the core city, the city, region) in the future, they are group gobbet structure, fingers structure, circle structure; The seventh part is to mainly put forward the development strategies for the different spatial structure models.

第一部分为前言，在阐明论文研究背景、目的及意义、思路的基础上，简要介绍了国内外城市空间结构相关研究成果；第二部分为概述，对城市空间结构的内涵、组成要素、研究尺度及其空间类型作以介绍；第三部分为理论基础，主要是对西方城市空间结构的3大经典模型(同心圆模式、扇形模式和多核心模式)以及与本研究相关的城市空间发展理论(增长极理论、点轴理论、核心——边缘理论、都市圈理论和城市空间演化理论)的介绍；第四部分为研究区概况，主要是对研究区域范围的界定及其社会经济发展概况介绍；第五部分是兰州城市空间结构演化分析，顺着兰州城市发展的历史脉络，在分析产业结构变动的基础上，着重对城市空间发展及其形态特征进行归纳总结，并分析了空间发展的主要影响因素；第六部分是兰州城市空间发展趋势分析，从中心城市、市域、区域3个空间层面上提出未来兰州城市空间结构的不同模式，即组团结构、指状结构、圈层结构；第七部分是城市空间发展策略，针对不同的城市空间发展模式提出一些对策建议。

In order to store the salt products, a godown of 30 m. span, with its capacity of 25,000 tons was built up.

为了堆存成品盐，须建造一座储存量为2.5万吨的散盐仓库。

A restaurant linen life of restaurant used cloth grass has a certain life span, therefore Laundry restaurant in addition to the normal cotton wash, but also the maintenance of good cotton and maintenance, as far as possible to extend the service life, reduce its reported loss rate.

餐厅亚麻生活在餐厅用布草有一定的寿命，因此，洗衣房，除了正常的棉花洗餐厅，而且还维护良好的棉花和维修，尽可能延长使用寿命，降低其报告损失率。

It is found that the spatially varying effects of the ground motions, especially the wave passage effect, have great influences on the dynamic responses of long-span structures.

研究表明，地震地面运动的空间变化效应对大跨度结构的响应有相当大的影响。

The bus dropped more than 20 feet and came to rest on the guardrail of the collapsed bridge span.

巴士下坠了超过20英尺，并落在了断裂桥跨的护栏上。

Tube-plate-spherical joints is a special type of joint when gusset plate connections to slotted tubes is applying in large span structures.

管板球节点是管板节点应用于大跨结构的加强形式。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切