una vez en + Posesivo + vida

= once in + Posesivo + lifetime

Ex. The Centre was set up in 1975 to study the environment of Hajj, the annual pilgrimage to Mecca performed by all Moslem adults once in their lifetime.

* * *

= once in + Posesivo + lifetime

Ex: The Centre was set up in 1975 to study the environment of Hajj, the annual pilgrimage to Mecca performed by all Moslem adults once in their lifetime.