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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In arid and semiarid regions, on the other hand, the small number of lakes and the great distances between them reduce the possibilities for correlation.

另一方面，在干旱和半干旱地区，湖泊数量少，湖泊之间距离远，减少了相互关联的可能性。

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Distribution of glires in arid regions of China is studied.

研究大沙鼠在中国干旱地区的分布。

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Even in arid market economies where every drop is precious, the price of water seldom reflects scarcity.

ECONOMIST: Water

In arid regions, in places feeling a need for the lack of water, underground water resources are often the only source of fresh water.

UNESCO: OFFICE IN TASHKENT

This is where MeerKAT named after a species of mongoose found in arid areas of south-western Africa such as the Karoo could play a crucial role.

ECONOMIST: A new radio telescope may catalyse African science