fissile phase

例句：

1. 1. The fissile material is used in nuclear reactors to produce energy.
   这种易裂变材料用于核反应堆中产生能量。
2. 2.During the fissile phase, the nucleus undergoes a series of complex reactions.
   在易裂变阶段，原子核经历一系列复杂的反应。
3. 3. The fissile phase is crucial for understanding the behavior of radioactive materials.
   易裂变阶段对于理解放射性物质的行为至关重要。