occasion

[ə'keiʒən]

释义

n.缘由，起因
Something which causes something else; a cause.

例句
Sarah: They're from my father.
Michael: Ah...what's the occasion?
Sarah: It's my birthday.(Prison Break)
莎拉：花是我爸爸送的。
迈克尔：呃，为什么送花？
莎拉：今天是我生日。（越狱）