criticality

• 名词，指处于危急或关键的状态，尤指核反应达到自持链式反应的临界状态。

A noun referring to a state of critical urgency or a critical condition, especially the point at which a nuclear reaction becomes self-sustaining.

不可数

1. State of urgent importanceC1formal

   A condition or situation that is extremely important or urgent, requiring immediate attention.

   危急重要性

   • The criticality of the patient's condition required an emergency surgery.
   • The project's criticality was emphasized by the tight deadline.
   • The team understood the criticality of the security breach.

   同义词acutenessexigencygravityimportanceseriousnessurgency

   反义词insignificancetrivialityunimportance

2. Nuclear chain reaction thresholdC2formalscientific

   The point at which a nuclear fission reaction becomes self-sustaining, typically in a reactor or atomic bomb.

   临界

   • The reactor reached criticality after the control rods were adjusted.
   • Scientists monitored the criticality of the experiment closely.
   • Achieving criticality is a key step in nuclear power generation.