0 a chemical compound used as a water softener and in foods and industry, in the form of white powder or crystals -- 碳酸钠
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。