0 relating to the buttocks (= the two soft parts of a person's bottom), especially the muscles -- 和臀部(尤指臀大肌)有关的
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。