circuitaladj.线路的(循环的)circuitn.巡回；线路；环形；电路；回路v.巡回；绕 ... 环形circuit--sharing关键单元共享circuit control mode电路控制方式circuit interlocking电路闭锁circuit organization电路结构circuits and systems电路与系统circuit access point电路接入点circuit board design电路板设计circuit graph theory电路图论circuit modification回路改造circuit of interface接口电路