retrace line

例句：

1. 1.We need to retrace our steps and try again.
   我们需要重新走一遍，再试一次。
2. 2.She retraced her steps back to the starting point.
   她重新走回了起点。
3. 3.The detective retraced his steps to find the clues.
   侦探重新走了一遍来寻找线索。