0 the study of ideas about the world, nature, and human life that are held by different cultures and do not form part of Western science -- 人种志研究
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。