a track or channel along which something runs, in particular 车道,通道,尤指 ■a water channel, especially an artificial one of running water in which fish are reared (用来养鱼的活水)人工水道 ■a groove or race in which bearings run (滚动轴承的)座圈,滚道 ■a pipe or tubing enclosing electric wires 线槽
a track for trotting, pacing, or harness racing 遛马道;挽车赛马跑道 ■a track for motor racing 赛车跑道