1 in Christianity, the existence of one God in three forms, the Father, the Son, and the Holy Spirit -- (基督教中的)三位一体(指圣父、圣子和圣灵合为上帝)
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。