talent

talent as + 職業
ex: I have a talent as a singer.
ex: He has a talent as a writer.

talent for + noun
ex : I have a talent for singing(writing).
ex : She has a talent for music.

He has a wealth of talent. 他有豐富的才能
-- wealth : 豐富, 大量[(+of)]
ex:The dictionary gives us a wealth of phrases and sentences to illustrate meaning.