Leonard jumped in his car and started backtracking.

里欧纳德跳上车，原路返回。

He promised there would be no backtracking on policies.

他保证不再改变政策上的决定。

His arrest sparked fears that the country was backtracking on market reforms.

他被捕一事引起恐慌，国家有关市场改革政策可能会有变动。

This is done so to avoid backtracking.

这样做是为了避免走回头路。

Is BFS is possible using backtracking?

高炉用回溯法是可能的吗？