0 a person who is forced or paid by someone in authority to do an unpleasant or secret job for them -- 傀儡;走狗,奴才
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。