network control unit

例句：

1. 1.The network control unit is responsible for monitoring the system's performance.
   网络控制系统单元负责监控系统的性能。
2. 2. The network control unit was designed to improve the user experience.
   网络控制系统单元旨在提高用户体验。
3. 3. The network control unit is essential for maintaining the security of the network.
   网络控制系统单元对于维护网络安全至关重要。