trackersn.追踪者（tracker的复数形式）trackn.轨道；跑道；踪迹；小路；乐曲v.追踪；跟踪tracking gate field of vie跟踪门视场|波门视场track and bridge structure离散trackless mining technique无轨采矿Trackline Multiunit Return轨迹线多装置回收Tracking test of responder应答机跟踪试验Tracking Light Electronics轻型跟踪电子设备track-and-field events田径赛Track--Subgrade system轨道-路基系统tracking and guidance radar跟踪制导雷达Tracking Merit Interception跟踪灵敏拦截