1 a person with a very high level of skill or knowledge in a particular subject -- 能手;奇才;高手
2 slang for amphetamine (= a drug that makes the mind and body more active) -- 苯丙胺;安非他明
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。