0 a type of virus that causes diseases in humans and animals. In humans, it usually causes respiratory infections (= in the nose, throat, or chest) that are not serious, but can sometimes cause more serious infections that can kill people: --
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.