0 to speak or write a few words about something or someone -- ~について言及する
1 used to emphasize the importance of something that you are adding to a list -- ~は言うまでもなく
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.
道路がどれだけ長くても、一歩一歩完了することができますし、足跡をマークしなければ、道路がどんなに短くても完了することはできません。