0 rude and unfriendly -- 生硬粗暴的;不友好的
1 An abrasive substance is slightly rough, and often used for cleaning surfaces. -- 清潔物體表面的研磨材料
2 a substance used for rubbing away the surface of something, usually to clean it or make it shiny -- (通常用來擦洗或擦亮表面用的)磨料
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。