[chéng nián]
（長大； 到達成熟年齡） grow up; come of age
be under age
未成年
The boy has reached an adult age and ought to be earning his own living.
這孩子已經(jīng)（到了）成年， 應該自食其力了。
（已成熟的； 已成年的） adult; grown-up
an adult; a grown-up
成年人
This meeting is for grown-ups only.
這次聚會只許成年人參加。
[口] （整年） year after year
be away all year
成年在外