0 fuels, such as gas, coal, and oil, that were formed underground from plant and animal remains millions of years ago --
1 a fuel such as gas, coal, and oil that has been produced in the earth from plants and animals --
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.