0 a small, low car used for racing, or a toy car that you operate with your feet -- 微型賽車;(用腳蹬著走的)玩具車
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。