0 (especially of children) showing mental development or achievement much earlier than usual -- (尤指儿童)智力超常的,早熟的
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。