0 an activity in which someone rolls down a hill or along the surface of water in a large transparent plastic ball -- 滾人球(人被置於一個透明塑膠大球內,滾下山坡)
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。