trackingn.跟踪;按学生能力分组动词track的现在分词形式.
trackn.轨道;跑道;踪迹;小路;乐曲v.追踪;跟踪
track smooth extrapolation航迹平滑外推
track string lifting frame长轨节吊架
trackless sliding fromwork无轨滑模
tracked engineer machinery履带式工程机械
track-circuit signalling轨道电路信号
Tracking System Test Stand跟踪系统试验台
track down an elusive fact追查难以明了的事实