0 a standard unit of temperature. One degree kelvin is equal to one degree Celsius. -- 開(開爾文溫標的計量單位,開氏一度等於攝氏一度)
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。