[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。