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In this paper we combining connecting tunnel project of Subway Line 4 at Xidan-lingjing bystreet in Beijing. To aim at the difficulties of building large-span connecting tunnels in the fine sand layer, through roads and underground pipelines, construction nearby buildings and other project difficulties. Using theoretical analysis, numerical simulation, field tests and other research methods to comprehensive and systemic research the stratum deformation mechanism and process control techniques of shallow excavation method, and a series of results were obtained. Firstly, use the stochastic media theory to analyze the stratum deformation mechanism, concretely analyze the analytic equation of surface horizontal displacement and deformation which were caused by the excavation of single-hole and double-hole tunnel, and further discussion on ground settlement, vertical deformation, surface horizontal displacement and horizontal deformation. Analyzing the main influence factors of surface displacement, and combined with practical work to proof the theory which was applied to shallow buried single-hole tunnel in fine sand layer was scientific.

本文结合北京地铁四号线西单～灵境胡同渡线隧道工程，针对在粉细砂地层中修建大跨渡线隧道，下穿道路和地下管线，临近建筑物施工等工程难点，利用理论分析、数值模拟、和现场监测等多种研究手段，对浅埋暗挖隧道地层变位机理及控制技术，深入地进行全面和系统的研究，并取得以下成果：(1)引入随机介质理论，对地层变位机理进行了分析，具体分析了单、双孔隧道开挖引起的地表位移及变形的解析方程，并深入探讨了地表沉降、垂直变形、地表水平位移和水平变形的特点，同时分析了影响地表位移的主要因素，并结合工程实例，佐证该理论应用于粉细砂地层浅埋暗挖单孔地铁隧道的科学性。

Internal forces and deformation of long span highway and railway cable stayed bridge in the ultimate limit state and serviceability limit state are calculated.

考虑几何非线性效应，计算大跨度公铁斜拉桥承载能力和正常使用极限状态下的结构变形和内力。

The cable sag effect, the beam-column effect and the large displacement effect are taken into account in the study. The results indicate that geometrical nonlinearity significantly influences the internal force of long span highway and railway cable stayed bridge, so the geometrical nonlinearity must be considered in design.

研究结果表明，几何非线性对大跨度公铁斜拉桥的内力影响比较显著，线性计算结果与非线性计算结果相比偏不安全，在公铁斜拉桥结构设计中，必须计入几何非线性的影响。

Scientists have previously shown that caloric restriction can increase life span in mice by 25 to 30 percent.

科学家早先的研究显示，限制卡路里摄取可以延长老鼠25％～30％的寿命。

The fundamental sex property that highway canalage traffic develops as national economy and society and service type business, want to get used to the higher demand of economic society development ceaselessly, must capture good luck, development innovation, come true to span newly hard type develops, be propped up to build comparatively well-off society to offer in the round and ensure.

公路水路交通作为国民经济和社会发展的基础性产业和服务性行业，要不断适应经济社会发展的更高要求，必须抓住机遇、开拓创新，努力实现新的跨越式发展，为全面建设小康社会提供支撑和保障。

The gray wolf, Canus lupus, also know as the timber wolf or tundra wolf, is the largest wild canid in North America and has a ten to eighteen year life span.

灰狼， canus狼疮，也知道作为木材狼或苔原狼，是世界上最大的野生犬科动物在北美地区，并已在10至十八年的寿命。

Incidentally, Sirius is called the Dog Star, since it's the most prominent star in the constellation Canis Major, and it becomes visible in the Northern hemisphere only during a certain span of time in the summer, which is why we call that period the "dog days of summer".

偶然地， Sirius称天狼星，因为它是多数在星座大犬星座的prominent星和它成为在仅北半球的visible在期间某一间距 time在夏天，是我们为什么称那个期间"酷热期 of夏天"。

This bridge design for 2×80m the continual steel truss girder bridge, the span is 160m, the main spar center distance is 5.75m, clothes rack high 11m, panel length 8m, the main spar geometry graphical representation uses the triangle web member system, the floor system by the carline, the crosnbeam is composed, the member connection uses the high-strength bolt connection, the design load for the dead load and - the live load.

该桥设计为2×80m连续钢桁梁桥，全长为160m，主桁中心距为5.75m，桁高11m，节间长8m，主桁的几何图示采用三角形腹杆体系，桥面系由纵梁，横梁组成，杆件连接采用高强螺栓连接，设计荷载为恒载和中—活载。

In the span of 30 years, such carnage would twice engulf this continent.

在30年战争中，类似的屠杀两次席卷了这个大陆。

Daily commutes in a hot, humid climate me an a shorter life span for your carnauba coat.

整日的在湿热的环境下意味着下蜡后的漆面保护寿命缩短。

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。