由于球面波的几何扩展产生的波前能量的损失，这种扩散作用可从波的振幅降低方面观测到。
The loss of energy from a wavefront as a consequence of geometrical spreading, observable as a decrease in wave amplitude.
通过地震波的衰减规律与塑性应变变化的比较可见，能量的消耗除了几何扩展衰减外，煤岩体的塑性变形方面也起了一定的作用。
Through the comparison of seismic wave attenuation and plastic strain, except for geometrical attenuation, the plastic deformation of coal and rocks is also contributing to energy consumption.
请给我展示一下扩展几何体。
应用推荐