0 a small container with medicine inside that you swallow -- 膠囊
1 the part of a spacecraft in which the people on it live -- 密封艙,太空艙
2 a flexible (= not stiff or fixed) structure surrounding an organ, joint, or other structure in the body -- (包圍器官、關節或其他結構的)囊,被膜
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。