0 a change that seems to happen in the rate of sound or light wave production of an object when its movement changes in relation to another object --
1 a change that someone experiences in the frequency of waves, for example, of sound or light, when the distance between that person and the origin of the waves changes --
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.