0 a person who has no home and usually no job, and who travels from place to place -- 流浪者;(通常指)無業遊民
They live a vagabond life/existence, travelling around in a caravan. 他們開著大篷車四處漂泊過活。
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。