0 an activity such as cleaning that is done carefully and completely -- 徹底做的事情;仔仔細細做的事情
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。