0 a small railroad, esp. in an amusement park, with open cars that travel quickly along a steep, curved track that goes up and down over and over --
an emotional roller coaster
1 a situation in which prices, rates, etc. keep going up and down by large amounts very quickly: --
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.