unsteady flow of groundwater
unsteady flow of groundwater
地下水不稳定流动
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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According to geologic model of unsteady groundwater flow in heterogeneous medium and adopting the finite difference solution, the direction and strength of oil gas migration can be quantified.
根据非均匀各向异性地层的非稳定的地下水流动模型，采用有限差分法求解，可以定量判断油气运移的方向及强度。
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