switched virtual circuit

例句：

1. 1.The switchboard is the main control center for the company's virtual circuits.
   交换机是公司虚拟电路的主要控制中心。
2. 2. The new software allows for seamless switching of virtual circuits between different networks.
   新软件允许在不同网络之间无缝切换虚拟电路。
3. 3. The engineers were tasked with switching virtual circuits to ensure smooth communication between departments.
   工程师们被指派负责切换虚拟电路，以确保各部门之间的通信畅通无阻。