0 a city in southern Wales that is the capital city of Wales, and is also a principal area (= an area with its own local government) -- 卡迪夫(威尔士首府,位于威尔士南部)
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。