假设地震振动了地板、纸、你和你的手。
Imagine an earthquake shock shaking the floor, the paper, you and your hand.
事实上，地震是地球是地球表面的振动。
In fact, the earthquake is that the earth is the earths surface vibration.
大地振动是地震最直观、最普遍的表现。
Vibration of the land is the most intuitive earthquake, the most common performance.
桥梁结构的动力特性就是结构振动的基本特性，是对桥梁结构进行地震反应分析的基础。
Dynamic characteristics of bridge structure is the foundation of seismic response analysis of bridge structures.
地震是一种复杂的振动过程。
地震是一种复杂的振动过程。
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