trigger decoder

例句：

1. 1. The car's engine has a faulty spark plug that needs to be replaced.
   这辆车的引擎有一个故障的火花塞，需要更换。
2. 2. The scientist used the device as a trigger for his experiments.
   科学家用这个装置作为他的实验的触发器。
3. 3. The alarm clock is set to go off at midnight, acting as a natural trigger for sleep.
   闹钟设定在午夜响铃，自然地成为入睡的触发器。