0 a room in a school where members of a particular group of students go for their teacher to record that they are present, usually at the beginning of the day -- (中小)学生早晨接受点名的教室
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。