0 involving people or organizations that choose to take part in an activity, rather than being chosen by someone else: --
The survey is self-selecting and does not include all trade associations - only those trade associations that have agreed to participate.
They are not a statistical sample, but a self-selecting section of the educated middle classes.
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.