The remaining 15 percent supply their own water from private Wells or other sources.
剩下15%从自己的井或者其他水源提供水。
Improvements in the existing water supply may take time, particularly if it is necessary to drill or dig Wells.
改进现有的供水系统很花时间，在需要钻井或挖井时尤为明显。
An aquitard stores water and transmits enough water to be regionally significant but not enough to supply individual Wells.
弱透水层存水且区域性地传导大量水，但不能充分供给每个井。
To get water by digging Wells close to the river can not only avoid these problems, but also improve the quality of water supply.
傍河打井取水，不仅能避免这些问题，而且能提高供水质量。
Self-supply wells in the groundwater over-extracted area will be phased out and the reconstruction and expansion of existing water distribution network will be completed.
有计划分步骤地关停地下水超采地区部分自备井，同时对现有供水管网进行改造。
There were two main sources of water supply for a city in the Pre-Qin period, one was drilling Wells for water, the other was digging ditches to draw water.
先秦时期城市的给水主要来源有两个，一是凿井取水，二是穿渠引水。
There were two main sources of water supply for a city in the Pre-Qin period, one was drilling Wells for water, the other was digging ditches to draw water.
先秦时期城市的给水主要来源有两个，一是凿井取水，二是穿渠引水。
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