0 A person's eighties are the period in which they are aged between 80 and 89: --
My grandmother is in her eighties.
The temperature is expected to be in the eighties tomorrow.
Margaret Thatcher was the UK prime minister in/during the eighties.
1 the numbers 80 through 89: --
The temperature is expected to be in the eighties (= between 80° and 89°) tomorrow.
Ronald Reagan was president in the eighties (= between 1980 and 1989).
My grandmother is in her eighties (= between 80 and 89 years old).
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.