double back
phrasal verb with double verb [ I or T ] uk/ˈdʌb.əl/ us/ˈdʌb.əl/
走回头路,原路返回
to turn and go back in the direction you have come from
We realized we had taken the wrong road and had to double back. 我们发现走错了路,于是不得不原路返回。
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