trackagen.轨道总称(铁路线全长)trackn.轨道；跑道；踪迹；小路；乐曲v.追踪；跟踪track ball pointer转球式(光标)指示器track string train轨排列车tracking technique跟踪技术tracking mechanism跟踪装置track-type jumbo有轨钻车track control unit[计] 道控制器track on solid bed整体道床track registration航迹校准tracking of target目标跟踪tracking indicator跟踪指示器