0 a type of rock or soil layer in which fossils of a particular group of organisms are found, which come from a particular time in the Earth's history: --
The rock yielded trilobites representative of the Solenopleuropsis biozone.
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.