verb
[no obj.]retrace one's steps
（由原路）退回去
Marilyn backtracked and went down into the basement.
玛里琳退回去，走到地下室。
to backtrack a little, the case is a complex one.
退一步看，这个案子很复杂。
■reverse one's previous position or opinion
出尔反尔；撤回
the unions have had to backtrack on their demands.
联合会不得不撤回他们先前的要求。
[with obj.](chiefly US)pursue, trace, or monitor
(主 美)跟踪；监视
he was able to backtrack the buck to a ridge nearby.
他能跟踪那雄鹿到附近山脊。