backstep sequence

例句：

1. 1. The algorithm backsteps to correct the error.
   算法回退以纠正错误。
2. 2. The team backstepped toavoid a collision.
   团队回退以避免碰撞。
3. 3. Theresearcher backstepped to investigate thecause of the failure.
   研究人员回溯以调查故障的原因。