life’s work
noun/ˌlaɪfs ˈwɜːk/
/ˌlaɪfs ˈwɜːrk/
(British English) (North American English lifework
[singular]/ˌlaɪfˈwɜːk/
/ˌlaɪfˈwɜːrk/
)- the main purpose or activity in a person’s life, or their greatest achievement
毕生的主要目的（或活动）；终生最大的成就