0 a hard hat that you wear to protect your head if you have an accident while you are riding a bicycle -- 腳踏車頭盔
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。