短語詞組短語reactivity step change 反應性堦躍變化rate of reactivity change 反應性變化率operating reactivity change 運行反應性變化hot -to-cold reactivity change 熱至冷反應度變化step change reactivity 堦躍變化反應性linear change of reactivity 反應性線性變化step change in reactivity 反應性堦躍變化 返回 reactivity change