0 an area that you are not able to see, especially the part of a road you cannot see when you are driving, behind and slightly to one side of the car: --
1 an area outside your car that you cannot see, esp. in your mirror, when driving --
2 a subject or area in which someone's ability to understand is weak or lacking: --
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.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.