self-ignition

例句：

1. 1. The engine's self-ignition mechanism is responsible for its start-up.
   发动机的自燃机制负责其启动。
2. 2. The car caught fire due to a faulty wiring system, which could be considered an example of auto-ignition.
   由于电线系统故障，汽车起火，这可以被视为自燃的一个例证。
3. 3. The pilot noticed the aircraft's sudden acceleration and suspected it was due to a spontaneous ignitionin the fuel tank.
   飞行员注意到飞机突然加速，并怀疑这是由于燃料箱中自发燃烧引起的。