0 the length of time that a living thing, especially a human being, is likely to live: --
Life expectancy in Europe increased greatly in the 20th century.
1 the average length of the life of members of a group of people or animals --
2 the length of time that a person is likely to live: --
Life expectancy is the major factor influencing senior life insurance premiums.
3 the length of time that something such as an electrical product is likely to last: --
As technology becomes more sophisticated, the life expectancy of household gadgets seems to diminish.
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.