0 a position for having sex in which a woman lies on her back and her partner is above and facing her -- 传教式体位(指寻常的男上女下的性交姿势)
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。