0 a person who has changed their feelings of support and duty from one political, religious, national, etc. group to a new one -- 叛徒;變節者;背叛者;叛教者
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。