When we withdraw into underground dwellings, the surface ground now occupied by cities can be turned over to park and to wilderness for recreation.
当我们撤到地下居所时，现在由城市占据的地面便可让位于公园和荒野，供人们休闲娱乐。
It is shown that underground group cavities significantly amplify the surface ground motion nearby.
数值结果表明，地下洞室群对附近地面运动具有显著的放大作用。
However, the displacement and deformation of surface ground by underground mining have destroyed initial equilibrium between the building and the ground.
但是由于地下开采引起地表产生的移动和变形，破坏了建筑物与地基之间的初始平衡状态。
Float glass and surface ground or polished glass, in sheets, whether or not having an ab - sorbent, reflecting or non-reflecting layer, but not otherwise worked.
浮法玻璃板、片及表面研磨或抛光玻璃板、片，不论是否有吸收、发射或非反射层，但未经其他加工。
The underground mine emergency refuge principle was provided. The surface ground would be the most safety and the personnel in emergency should be quickly and safely back to the surface.
提出了煤矿井下紧急避险原则：地面最安全，遇险人员应尽快安全撤至地面。
The impact of coal mine goaf on seismic surface ground motion and its dynamic stress distribution around the tunnel was investigated.
研究了煤田采空区对地面地震动的影响以及采空巷道的动应力分布。
The study on effects of liquefied zone on surface ground motion and seismic response of buildings is one of the very important subjects in the engineering of earthquake-resistance of structure.
液化土层对地面运动及结构地震反应的影响是工程抗震领域中非常重要的课题之一。
The study on effects of liquefied zone on surface ground motion and seismic response of buildings is one of the very important subjects in the engineering of earthquake-resistance of structure.
液化土层对地面运动及结构地震反应的影响是工程抗震领域中非常重要的课题之一。
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