0 happening or being done at exactly the same time: --
There were several simultaneous explosions in different cities.
1 happening or existing at exactly the same time: --
The report will be broadcast in Russian with simultaneous English translation.
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.