0 a piece of equipment used to measure the density (= amount of matter in a particular quantity) of liquids, especially a long glass tube, closed and with a weight at one end so that it floats vertically -- 液体比重计,浮秤(用于测量溶液密度的仪器,尤指封闭的长试管,一端有砝码,可使液体竖直流动)
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。