地震是一种经常发生的自然现象，地表之下每天要发生几千次的震动，但大地震还是比较少见的。
Earthquakes are a common occurrence, rumbling below earth's surface thousands of times every day. But major earthquakes are less common.
建议区别地震动、房屋震害和地震地面破坏三类不同的物理现象以分别描述地震影响和地震灾害。
The author suggested describing seismic influences and disasters based on the ground motions, building damages and geological hazards respectively.
在进行结构-地基动力相互作用体系振动台模型试验中，再现了地震动激励下有建筑物存在的砂质粉土软土地基的液化现象。
The liquefaction phenomena of sandy powder soil under building footing are reproduced with shaking table tests on dynamic soil_structure interaction.
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