Web轨道. track uk / træk/ us / træk/ C1 noun. the pair of long metal bars fixed on the ground at an equal distance from each other, along which trains travel: a ten-mile stretch of track 10英里长的铁轨. orbit uk / ˈɔː.bɪt/ us / ˈɔːr.bɪt/ noun. the curved path through which objects in space move around a planet or star: