0 (especially of sheets of iron or cardboard) having parallel rows of folds that look like a series of waves when seen from the edge -- (尤指鐵板或紙板)波紋狀的,有瓦楞的
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。