0 a particle that contains three quarks, especially a neutron or a proton --
1 a particle (= small piece of matter that makes up an atom) that contains three quarks, esp. a neutron or a proton --
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.