0 complete freedom to do something -- 全权;绝对的自主权
[ + to infinitive ] The landlord has given her carte blanche to redecorate the living room. 房东让她自主决定如何重新装修客厅。
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。