It takes power to gather water, purify water, and distribute water, especially in places like southern California where water is piped hundreds of miles to supply Los Angeles' sprawling demands.
收集水、净化水和分配水都需要能源消耗，特别在好像南加州那样有广阔需求的地方，需要通过几百公里管道运输水到洛杉矶。
The article also have made a study of the power supply for each part, classify the power supply types, especially drive power and control power, in order to avoid disturbance each other.
本文还研究设计了清扫机器人各个部件模块的供电情况，分类供电，特别是动力电源和控制电源，尽量避免相互干扰。
Its superior filtering characteristics can be used in communications system. Especially in bioelectrical signal processing, it can be used to filter the disturbance caused by power supply.
它的优良的滤波特性除用于通讯系统外，特别适于在生物电信号处理中滤除由电源引起的干扰。
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