the power source or supply的意思|示意

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。

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。