The television power supply demands low ripple voltage, and the passive rc buffer circuit used in television before, decreased the power effect.
电视机电源要求非常低的纹波电压，过去电视机所采用的是大的无源rc缓冲电路，使电视机的电源效率比较低下。
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。
In this paper, it is pointed out that the ripple factor will meet the test demands by choosing 12 pulsating wave controlled rectifying power supply as the test supply.
文章指出，采用十二脉波可控整流电源作为试验电源，其纹波系数能满足试验要求。
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