nuclear reaction threshold

例句：

1. 1.The nuclear power plant is designed to operate at a certain level of radiation.
   核电站的设计是为了在一定的辐射水平下运行。
2. 2.The scientists have found a way to increase the efficiency of the nuclear reactor without exceeding the threshold.
   科学家们已经找到了一种方法，可以提高核反应堆的效率，而不超出阈值。
3. 3. The research team has determined the critical point for the nuclear reaction, which is crucial for understanding the process.
   研究小组确定了核反应的临界点，这对于理解这个过程至关重要。