0 a set of related events in which each event causes the next one, or a chemical reaction in which each change causes another: --
1 a set of related events in which each event causes the next one: --
2 a series of nuclear reactions in which neutrons (= part of an atom) released by fission (= the dividing of an atom) go on to cause more fission --
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.