perturbation function

例句：

1. 1. The sudden noise caused a perturbation in the room.
   突然的噪音使房间里产生了扰动。
2. 2.The earthquake caused widespread perturbation in the city.
   地震在城市中引起了广泛的扰动。
3. 3.The scientist observed that the perturbation affected the stability of the system.
   科学家观察到扰动影响了系统的稳定性。