series negative impedance

例句：

1. 1. The series of events leading up to the accident was quite complex.
   导致事故的一系列事件相当复杂。
2. 2. This is a series of steps that you need to follow in order to complete the task.
   这是一系列步骤，你需要按照顺序完成这项任务。
3. 3. The series of photos depicts the journey from the city center to the beach.
   这一系列照片描绘了从市中心到海滩的旅程。