0 If you live on an amount of money, that is the money that you use to buy the things that you need. -- 依靠(…錢)生活
1 to only eat a particular type of food -- 靠(…食物)生存;只吃
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。