0 a small, hard, white ball used for playing golf -- 高尔夫球
1 a small metal ball with raised letter shapes on it, used in some types of computer printers and typewriters -- (计算机打印机或打字机的)球形字头
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。