circuit.

柯林斯词典

1. N-COUNT An electrical circuit is a complete route which an electric current can flow around. 电路
Any attempts to cut through the cabling will break the electrical circuit. 任何切断电缆的做法都会使电路中断。
2. →see also closed-circuit
3. N-COUNT A circuit is a series of places that are visited regularly by a person or group, especially as a part of their job. 巡回的场所
It's a common problem, the one I'm asked about most when I'm on the lecture circuit. 这是个常见问题，一个在我巡回演讲时人们最常问到的问题。