回火作业包括将淬硬钢重新加热到低于临界范围的某一温度然后以任意速率冷却。
The operation consists of reheating quench-hardened steel to some temperature below the critical range followed by any rate of cooling.
最近，开始逐渐清晰的一点就是，大脑活动也有大范围自我组织临界的迹象。
More recently, it has become clear that brain activity also shows signs of self-organised criticality on a larger scale.
淬火。这个工艺是把材料加热到临界温度范围之上，然后迅速冷却到临界温度范围以下，使钢材明显变硬。
Hardening. This is the process of heating to a temperature above the critical range, and cooling rapidly enough through the critical range to appreciably harden the steel.
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