fission trigger

例句：

1. 1. The fission trigger is the key to unlocking the nuclear reactor's safety features.
   裂变触发器是解锁核反应堆安全特性的关键。
2. 2.The fission trigger mechanism is designed to prevent unauthorized access to the nuclear facility.
   裂变触发机制被设计来防止未经授权进入核设施。
3. 3. The fission trigger device was used to initiate the chain reaction in the nuclear reactor.
   裂变触发装置用于在核反应堆中引发链式反应。