The paths of incidence and reflection are in a plane normal to the surface.

入射和反射的路径都在与表面垂直的平面内。

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However, in the presence of amplitude variation with offset (AVO), and particularly at large offsets, reflection coefficients and polarities may differ significantly from those at normal incidence.

然而，在振幅随炮检距变化的情况下，即当偏移距范围很大时，无论是反射波的振幅还是极性都发生了非常大的变化。

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