布白之法，如同上述，宜重虚实呼应、疏密变化。
White cloth of the law, as above, the actual situation should re-echo the change in density.
本文从理论上分析了产生干涉条纹及干涉条纹疏密粗细变化的原因。
The reason of the phenomenon and variation of the stripe in theory are analyzed.
合成平均速度点的疏密主要由作图比例尺而定，在构造复杂的部位应适当地加密，以便控制速度的横向变化。
The velocity points at the part where geological structure is complicated should be appropriately densified in order to picture the lateral variation of velocity.
合成平均速度点的疏密主要由作图比例尺而定，在构造复杂的部位应适当地加密，以便控制速度的横向变化。
The velocity points at the part where geological structure is complicated should be appropriately densified in order to picture the lateral variation of velocity.
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