a form of motorcycle racing in which the riders race several laps around an oval dirt track, typically in a stadium (尤指在体育场中举行的)摩托车赛 ■[count noun]a stadium or track used for this sport 举行摩托车赛的体育场(或赛车道) ■(N. Amer.)a road or track used for motor-car racing (北美)汽车比赛路段(或赛车道) ■(N. Amer.)a highway for fast motor traffic (北美)高速公路