任何突然出现的过量中子数会加速裂变反应，增加反应堆能量输出。
Any sudden excess of neutrons will accelerate the fission reaction and increase the reactor's power output.
这也就是PCR呈现负值会出现的情况。 因为PCR负值的反应堆会自动限制穿越反应堆的中子数，所以会在短暂的能量增加后减慢增长速度。
This is where having a negative PCR is handy, because it automatically limits the number of neutrons flying through the reactor, so it damps itself down after a momentary power increase.
PCR是一座反应堆的核中子数会在反应堆能量增加后增加或减少的衡量标志。
The power coefficient of reactivity (PCR) is a measure of whether a particular reactor's nuclear neutron population will tend to increase or decrease after an increase in the reactor's power.
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