When the planetarium sky matched the sky outside, the birds fluttered in the direction of their normal migration.
当天文馆的天空与外面的天空相匹配时，鸟儿们就朝着它们正常迁徙的方向飞翔。
Reservoirs porosity was greatly reduced by the early compaction and dissolution. But this situation does not affect the normal migration of oil and gas.
早期压实和压溶作用使储层孔隙度大大降低，但不影响油气正常运移。
Plane wave has the overall direction, compared with the normal migration, the plane-wave imaging results can be comparable to, and has a high computational efficiency.
平面波具有全局方向性，相对逐炮偏移而言，平面波偏移成像的结果是可以与其相相比的，并有很高的计算效率。
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