0 one person in a group who agrees not to drink alcohol in order to drive the other people to and from a place where they will drink alcohol: --
Tom said he'd be the designated driver when we go out tonight.
1 someone in a group who avoids drinks containing alcohol while others are drinking and is then able to drive the others home safely from a social event --
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.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.