在有限弹性变形中，边界力的方向与密度将随弹性体的变形而发生显著变化。
In finite elastic deformation, the direction and the density of the boundary force can greatly change with the deformation of the elastic body.
重力方法重要的地质应用之一是主要根据重力异常及密度变化追踪构造的边界。
One of the important geological applications of the gravity method is to trace the boundaries of structures across which gravity anomalies and the density contrast differs significantly.
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