0 a standard or accepted way of doing or making something -- 惯例;配方;处方
1 a series of letters and symbols that show what substances make up a particular chemical element or compound -- 分子式
2 a type of milk that can be given to babies instead of milk from their mother -- (婴儿)配方奶
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。