Because the source of the energy stops, the electrical current stops - just as a light bulb turns off when you switch off the electricity running to it.
因为一旦能量的来源被切断了，电流就会被切断——就好像当你关上开关，切断电流的时候，灯泡会立刻熄灭一样。
Because the source of the energy stops, the electrical current stops -just as a light bulb turns off when you switch off the electricity running to it.
因为一旦能量的来源被切断了，电流就会被切断——就好像当你关上开关，切断电流的时候，灯泡会立刻熄灭一样。
In this plan, the power source system was make up of by the digital control circuit part and current adding switch part and constant current source part.
此方案中的电源系统由数字控制电路、电流叠加开关和恒流源组成。
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