0 to stop someone or something developing or doing as well as they should -- 阻礙…的發展
1 If you hold someone or something back, you stop him, her, or it from coming or moving forward. -- 阻擋,阻止
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。