3N-COUNT (尤指工作时的)巡回线路,巡回,巡游 A circuit is a series of places that are visited regularly by a person or group, especially as a part of their job. (尤指工作时的)巡回线路,巡回,巡游
He joined the professional circuit.
他参加了职业巡回赛。
It's a common problem, the one I'm asked about most when I'm on the lecture circuit.