Analysis of surface stream and energy fields obviously showed that the squall line occurred behind the surface shear line, and before the convergence area of wind.

地面流场和能量场的分析明显反映出了飑线在地面切变线后部，风向、风速辐合区前部。

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Conversely, a pond with a stream flowing in one end and out the other, which dries up when the stream dries up, is clearly surface water dominated.

相反，有径流从两端流进流出的池塘，在径流枯竭的时候也会干涸，地表水就明显占据主导地位。

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Groundwater commonly collects in stream drainages but may remain entirely beneath the surface of dry stream-beds in arid regions.

地下水通常聚集在河流流域，但在干旱地区，地下水也可能完全保留在干涸河床的表面之下。

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