0 used to show movement into or on a particular place: --
1 used about changing to, or starting to talk about, a different subject: --
3 knowing about someone or something that can be useful to you: --
4 If you are onto someone, you talk to that person, especially to ask them to do something, or to complain to them: --
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.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.