另一方面，地铁牵引供电网络是一个交直流混合的网络，运行方式较为复杂。

On the other hand, since traction power supply network is a AC-DC network, its running modes are complicated.

youdao

另一方面，地铁牵引供电网络是一个交直流混合的网络，运行方式较为复杂。

On the other hand, since traction power supply network is a AC-DC network, its running modes are complicated.

youdao