The multiple migration-accretion concept of Gruner deserves mention.
格鲁纳的多次迁移――增长说受到了重视。
The gas reservoirs in Yong'anzhen faulted belt of Dongying sag are secondary reservoirs accumulated via multiple migration and differentiation.
东营凹陷永安镇断裂带天然气藏为石油伴生气经多次运移分异聚集形成的次生气藏，其成藏因素较为复杂。
The consumed CPU time of the multiple migration is not too much, because multiple travel-time calculations for the different percentages of the velocity model are unnecessary.
由于无需对不同百分比速度模型重复计算旅行时，多次叠前时间偏移所耗费CPU时间并不多。
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