Flows in open pump sumps are complex movements with free surface.

式水泵吸水池内流动是具有自由表面的复杂流动。

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The cut-off negative pressure method is one of effective approaches to solve the seepage flow problem with free surface.

截止负压法是求解有自由面渗流问题较为有效的算法之一。

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The two cases show that the numerical manifold element method is simple and effective in resolving the problem of seepage with free surface.

算例表明，该方法用于有自由面的渗流分析是简单有效的。

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They give up, he says, and in the process form nearly defect-free structures that exhibit incredible bonds with the surface of the metal.

FORBES: Steely Dan

So far, it has only scratched the surface, with a clutch of measures to free up the professions and such small businesses as taxi-driving.

ECONOMIST: The budget passes, but more troubles loom ahead

Drogba had a second chance with another free-kick shortly after but dragged his shot wide, prompting frustration to surface in the stands.

BBC: Chelsea 1-0 Bolton