A 500-year-old arch door on the Great Wall has been reduced to ruins in north China's Shanxi Province after a strong gale hit last week.

We walked under the big gingko trees, just like we were walking under a tree arch door.

我们走在大树下，好象走在树搭建成的拱门下。

RC-masonry combination arch bridge abandons the disadvantages of conventional masonry arch bridge's falsework type construction, which makes longer construction time, higher cost and against protecting environment.

RC-石砌体组合拱桥摒弃了传统石砌拱桥采用有支架施工造成的工期长，造价高，不利于环境保护的缺点；

The arch belly gravity dam is a new type of dam. Its upstream face is inclined and it has a belly arch within.

腹拱式重力坝是一种新坝型，坝上游面倾斜，坝内设有腹拱。

Rupture test studies of the arch belly gravity dam under overloading

腹拱重力坝超载破坏试验研究

Results Zygomatic arch was an anatomical key for medial skull base and infratemporal fossa exposure. The length of the zygomatic arch and the width of the mandibular fossa were 32.9 ± 2.6 mm and 15.5 ± 1.3 mm respectively.

结果颧弓是暴露中颅底和颞下窝的关键，颧弓长度和下颌关节窝宽度分别为32.9±2.6mm和15.5±1.3mm；

For high arch dams, the key problems include monolithic stability evaluation, cracking evaluation of dam-heel, reinforcement design of dam-toe and faults of dam foundation, and the value of mechanics parameter of rock mass.

高拱坝结构整体稳定性评价、高拱坝坝踵开裂稳定评价、高拱坝坝趾加固设计、高拱坝基础断层的加固处理及岩体力学参数取值问题为高拱坝设计中的关键问题。

Carotid sinus and aortic arch baroreflex plays the key role in buffering the fluctuation of blood pressure and keeping blood pressure homeostasis.

颈动脉窦、主动脉弓压力感受器反射是缓冲血压变化，维持机体血压稳态的重要调节机制。

Rese arch On The Key Technologies' Countermeasures In the Design of Combined Bridges With Prestressed Continuous Beam and Arch

连续梁拱组合桥梁设计关键技术对策研究

Conclusion: Relieving the tension of anastomosis, enlarging the outlet of thorax and the space posterior to aortic arch are key steps for preventing anastomotic fistula.

结论：降低吻合口张力，保证胸腔入口、主动脉弓后间隙宽畅是避免吻合口瘘发生的关键。

The structure of the middle load and concrete-filled steel tube ( CFST) "Fly-bird-type" arch bridges, with flexible tied bar, uses tie bar to balance the arch structure horizontal thrust.

飞燕式钢管混凝土拱桥为中承式柔性系杆拱结构，通过张拉柔性系杆来平衡拱结构的水平力。

Though in terms of structure system, rigid-framed tied arch bridge belongs to an arch bridge without thrust, and its load path is clear, the construction process is long and complex.

从结构体系上看，刚构系杆拱桥属于无推力结构，传力路径明确，但是，结构的形成过程较为复杂、漫长。

Otherwise, the stability of arch support is controlled by arch abutment thrust. This paper analyzes the influencing factor of arch abutment thrust fatherly, like the forms of slabs and.

而拱座的稳定性由拱端推力水平控制，本文在以往研究的基础上，进一步研究拱端推力的影响因素，比如板块的形式。

Kunshan Yufeng bridge& design of the first long-span leaning-type arch bridge without thrust

昆山玉峰大桥&首座大跨度无推力斜靠式拱桥的设计研究

Dynamical Characteristics of Arch Bridge Without Thrust and Analysis of the Train Running Safety

无推力式钢桁系杆拱桥动力特性及列车走行性分析

In order to simulate the construction processes and reveal the stress and deformation processes of the dam body and slope, the application of arch dam thrust is employed based on the states of excavation, unloading and reinforcement that have already been completed;

为更好地模拟施工过程，反映坡体和坝体的应力和变形过程，在边坡开挖、卸荷、加固工况计算已完成的基础上进行坝体推力施加的分析；

Increasing the arch thrust augments the shear stress on the surface of the shearing resistance part, which counteracts the influence of the crushed rock.

同时由于拱向应力的增大，即增大了抗剪面剪应力，抵消了坝体下游破碎岩石的影响。

Aimed at the two types of high speed railway long span steel bridge-slab truss composite system and arch truss composite system, an analysis of random vibration response of time dependant train bridge system has been made in detail.

本文针对高速铁路大跨度钢桥板桁或拱桁组合体系两种主要桥式，对列车与桥梁时变系统的随机振动响应作了较详细的分析。

Compared with the accustomed single-layer reticulated shells, Tianshan Rice Cube reticulated shell roof adopts compound structures which combines the single-layer reticulated shell and suspend arch truss together.

与传统单一的单层网壳相比，天山米立方屋盖网壳结构在结构形式上采用单层网壳与弦支拱桁架所复合的弦支拱桁架-单层网壳复合结构。

The pre-stressed arch truss string structure is one of the new pre-stress steel structure styles, because it possessed of rational mechanical feature, it has been used in many national and foreign engineering practices.

预应力张弦拱桁架结构是一种新型的预应力钢结构形式，由于其受力合理的特点在国内外工程实践中得到了较多应用。

To improve the structural vertical stiffness and strength, an arch truss was added in the front of the cantilever, and the increased areas of lower chords were used.

在悬挑部分的最前檐增加一榀拱形桁架，并且加大其下弦杆件的截面面积，以提高结构竖向刚度和强度；