star-mesh transformation

例句：

1. 1. The star-mesh transformer is a critical component in the power grid.
   星网变压器是电网中的关键部件。
2. 2.The star-mesh transformer has been optimized to reduce energy loss.
   星网变压器经过优化以减少能量损失。
3. 3. The star-mesh transformer is used to convert electrical signals into different frequencies.
   星网变压器用于将电信号转换为不同频率。