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 and field athelete田径运动员
Track and Field Programs田径课程
trackless rubber-tyred无轨胶轮
track and field movement田径动作
Tracked Recovery Vehicle履带式抢修车
track occupation diagram线路占用图,股道占用图
track-slip type packer轨道式卡瓦封隔器
track and field elective田径选修课
tracking and supervision跟踪监管
track quality management钢轨质量管理