0 a small room in which a very high air pressure is reduced slowly to the normal level to prevent or treat decompression sickness -- 减压舱(或室),降压舱(或室)
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。