粒子轨道; 比赛跑道
赛马场
跑道
(主要用于赛马, 赛狗的)跑道
a circuit or course, esp an oval one, used for motor racing, speedway, etc
Also called: racecourse a long broad track, usually of grass, enclosed between rails, and with starting and finishing points marked upon it, over which horses are raced
1. a course over which races are run
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粒子轨道; 比赛跑道
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