0 to change the characteristics of a substance, for example by the action of heat or an acid -- 改变…的性质;使失去自然属性
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。