0 a thick, clear substance that comes from seaweed, used for growing organisms such as bacteria in scientific work, and also for making liquids thicker -- 琼脂(海草中提取的一种透明粘稠物,可用于微生物培养基和食物增稠剂)
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。