retrace

1.~ sth沿原路返回；折回to go back along exactly the same path or route that you have come along

2.~ sth重走（别人走过的路线）to make the same trip that sb else has made in the past

3.~ sth追溯；找出；回顾to find out what sb has done or where they have been

1.折回,折返,退回

2.探源,调查追溯

3.回想,回忆;回顾,回头看,重看

4.重新再描摹

1.to return along the same path or route that you have just traveled along; to go along the same path or route that someone else has gone along previously

2.to discover where someone or something has been and what happened to them there by examining evidence, asking questions, etc.