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Currently, the bridge deck surfacing is one of the crucial techniques of long-span steel bridges construction.

目前，桥面铺装技术已成为建设大跨径桥梁的关键性技术之一。

Long-span steel bridge deck pavement is a box girder bridge-building, one of the key technologies, domestic less successful experiences.

桥面铺装是大跨径钢箱梁桥建设的关键技术之一，国内成功经验较少。

The development of flutter and buffeting analysis of long-span bridges both in the frequency domain and in the ti...

本文回顾了大跨度桥梁颤振和抖振的频域、时域分析理论方法的进展。

In fact, one can of premises, land-use period on the ground should be the normal life span of the building line.

他说： 事实上，人们可以房舍，土地使用期在地面上应该是正常的寿命线的建设。

Coal bunker ; large-span coal transport trestle ; successive truss ; optimization of design

贮煤仓；大跨度输煤栈桥；连续桁架；优化设计

The rod is fed through the center of the rear fuselage where it is supported by a bushing in the middle of the span.

棒是美联储通过该中心的后方机身的地方，这是支持由一个套管，在中东的跨度。

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。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。