scale trace

例句：

1. 1. The engineer drew a scale trace of the building's exterior.
   工程师绘制了建筑物外观的刻度线。
2. 2.The scientist used a scale trace to measure the size of the sample.
   科学家使用刻度线来测量样本的大小。
3. 3.The artist painted a scale trace on the wall for decoration.
   艺术家在墙上画了一个刻度线作为装饰。