0 an officer who is in charge of a military organization or building, such as a prison for soldiers used during a war -- 指挥官,司令官
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。