cascade power-frequency testing transformers

例句：

1. 1.The cascade of leaves creates a beautiful natural landscape.
   落叶的瀑布创造了美丽的自然景观。
2. 2.The cascade of data is overwhelming for the system to process.
   数据流的级联对系统处理来说过于庞大。
3. 3.The cascade of events led to a series of unfortunate outcomes.
   一系列事件导致了不幸的结果。