0 to go back to doing something bad when you have been doing something good, especially to stop working hard or to fail to do something that you had agreed to do -- 倒退,退步;故态复萌(尤指不再努力工作或不做承诺过的事)
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。