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。
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.
偏移图像被套用在帧上，其中同一群组中的每个帧的每一行的偏移图像用相同的极性显示。
The offset pattern is applied on the frames, wherein the offset pattern is displayed at the same polarity in the same column of each frame in the same group.
偏移图像被套用在帧上，其中同一群组中的每个帧的每一行的偏移图像用相同的极性显示。
The offset pattern is applied on the frames, wherein the offset pattern is displayed at the same polarity in the same column of each frame in the same group.
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