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 telephone exchange追踪电话交换track structural parameters轨道结构参数Track- and- field Coach田径教练员Track Coach of Old Shanghai旧上海的有轨电车track transportation system有轨运输track and field competition田径比赛Track Laying Control Points铺轨基标track laying and ballasting轨道铺设track maintenance machinery养路机械tracking simulation control跟踪模拟控制