0 a circular or oval area of ground around which rows of seats are arranged on a steep slope, for watching plays, sports, etc. outside -- (露天)圆形剧场(或竞技场)
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。