1. An instrument for copying a plane figure to a desired scale, consisting of styluses for tracing and copying mounted on four jointed rods in the form of a parallelogram with extended sides. 
   缩放仪一种按所需的比例复制平面图片的仪器，由用于描绘和复制的描画针组成，描画针置于四根有活节的杆上，四根杆构成可调整边长的平行四边形
2. An electrically produced graph or tracing. 
   电示图以电制作的图表或映描图
3. He knew they were tracing him. 
   他知道他们正在追踪他。
4. Trace a wounded deer; tracing missing persons. 
   跟踪一头受伤的鹿；追寻失踪者
5. A record or tracing produced by a plethysmograph. 
   体积描记图由体积描记器作出的记录或轨迹

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• 1. 描图仪器
  {n.}跟踪信息 tracing instrument...描图仪器 tracing loop pass...{n.}跟踪循环遍 tracing loss
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