Reactivity is an increase in negative emotions or a decrease in positive emotions.

情绪反应是指消极情绪的增加或积极情绪的减少。

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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.

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。

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Removal of heavy oil from the liquefaction residue leads to the decrease of the gasification reactivity of residue char.

脱除残渣中的重质油会降低残渣焦的气化反应性。

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