These reservoirs even out the flow of the river by controlling floods in winter and releasing water in dry periods.

这些水库通过冬季制洪和旱季放水使河水的流量保持稳定。

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In dry periods, the water table will be lower, or it will disappear altogether, because no water is soaking into the ground.

干旱时节，地下水位会降低，或者全然消失，因为没有水渗透到地里。

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In dry periods, most of these areas are no longer so hospitable, but the floodplain of the river still maintains a steady flow of water, providing a stable, though not ideal, nesting area.

在干旱期，大部分地区变得不再那么好客，而河流泛洪区依然维持着稳定的水流，并提供着虽不理想但稳定的湿地栖息地。

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He says that the site dates back even further than first thought and can reveal much about the fluctuations between wet and dry periods in the Arabian Peninsula.

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Never store your clothes over long periods in plastic dry-cleaning bags which emit gases that can stain or yellow fabrics as well as break down the elasticity in stretch garments.

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In addition, aquifers offer an essential buffer to populations in dry regions by providing a reliable source of water even during long periods without rainfall.

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