0 a piece of art made of three paintings connected to each other in a way that allows the two outer ones to fold in towards the larger central one -- 三幅相联的图画
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。