Power supply or circuit capable of regulating either alternating or direct current within 5% of desired value, and limiting the open circuit (source) voltage to 20 millivolts maximum.

电源及能调节交流或直流电流在期望值的5%之内的，控制开路电压到最大20毫伏的路。

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We know from botany to know, plant growth and transpiration of water supply is provided by the source or power.

从植物学中我们很清楚的知道，植物的生长和供水是通过蒸腾作用提供源动力的。

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Each unit can also serve as a source of electrical power for the military, or emergency response, something always in short supply in forward operating positions.

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