这就为研究激光的工作人员出了一个难题：如果能量输出有两种形式，他们怎样运用电荷守恒和能量守恒定律呢？
This posed a conundrum for researchers working with the laser: How were they to apply the laws of conservation of charge and conservation of energy with two forms of energy output?
平行式要求伺服系统具有良好的速度稳定性，保证恒定的速度输出。
And that parallel mode requires the servo system to have good speed stability to ensure invariable output of speed.
调节器的作用就是保证发电机在输出电能的电压能够保持恒定，保护设备安全运行。
The role of the regulator is to ensure that the generator output voltage to maintain a constant energy, protect the safe operation of equipment.
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