0 to say who you are when you arrive at a hotel so that you can be given a key for your room: --
1 to go to a desk at an airport, port, etc., or a hotel and say that you have arrived: --
2 to use the internet to check in for a flight: --
You will find it most convenient to check in online.
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.