图片表明，该发生器可以照亮一五瓦特直流电能节省灯泡。
The picture demonstrates that the generator can light up a 5watts DC energy save bulb.
有源逆变器可以将直流电能转变为交流电能反馈给电网，从而实现电能的回收再利用。
Active inverter can convent DC into ac and send it back to the power network, so that reclaim the electricity energy.
开关变换器能够将一种直流电能转换成另一种或多种直流电能，是直流开关电源的主要组成部分。
Switching converter may translate one kind of DC electric power into another or more one, and is the main part of DC switching power supply.
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